Updated docs for all packages on npm pages (#1013).

packages/abi/README.md

@@ -1,15 +1,50 @@
 Ethereum ABI Coder
 ==================
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is responsible for encoding and decoding the Application Binary Interface (ABI)
+used by most smart contracts to interoperate between other smart contracts and clients.
 
-API
----
+For more information, see the [documentation](https://docs.ethers.io/v5/api/utils/abi/).
 
-`@TODO`
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    ConstructorFragment,
+    EventFragment,
+    Fragment,
+    FunctionFragment,
+    ParamType,
+    FormatTypes,
+
+    AbiCoder,
+    defaultAbiCoder,
+
+    Interface,
+    Indexed,
+
+    /////////////////////////
+    // Types
+
+    CoerceFunc,
+    JsonFragment,
+    JsonFragmentType,
+
+    Result,
+    checkResultErrors,
+
+    LogDescription,
+    TransactionDescription
+
+} = require("@ethersproject/abi");
+```
 
 License
 -------

packages/abstract-provider/README.md

@@ -1,15 +1,56 @@
 Abstract Provider
 =================
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is responsible for defining the common interface for a Provider, which in
+ethers differs quite substantially from Web3.js.
 
-API
----
+A Provider is an abstraction of non-account-based operations on a blockchain and
+is generally not directly involved in signing transaction or data.
 
-`@TODO`
+For signing, see the [Abstract Signer](https://www.npmjs.com/package/@ethersproject/abstract-signer)
+or [Wallet](https://www.npmjs.com/package/@ethersproject/wallet) sub-modules.
+
+For more information, see the [documentation](https://docs.ethers.io/v5/api/providers/).
+
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    Provider,
+
+    ForkEvent,
+    BlockForkEvent,
+    TransactionForkEvent,
+    TransactionOrderForkEvent,
+
+    // Types
+    BlockTag,
+
+    Block,
+    BlockWithTransactions,
+
+    TransactionRequest,
+    TransactionResponse,
+    TransactionReceipt,
+
+    Log,
+    EventFilter,
+
+    Filter,
+    FilterByBlockHash,
+
+    EventType,
+    Listener
+
+} = require("@ethersproject/abstract-provider");
+```
 
 License
 -------

packages/abstract-signer/README.md

@@ -1,15 +1,32 @@
 Abstract Signer
 ===============
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is an abstraction of an Ethereum account, which may be backed by a [private key](https://www.npmjs.com/package/@ethersproject/wallet),
+signing service (such as Geth or Parity with key managment enabled, or a
+dedicated signing service such as Clef),
+[hardware wallets](https://www.npmjs.com/package/@ethersproject/hardware-wallets), etc.
 
-API
----
+For more information, see the [documentation](https://docs.ethers.io/v5/api/signer/).
 
-`@TODO`
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    Signer,
+    VoidSigner,
+
+    // Types
+    ExternallyOwnedAccount
+
+} = require("@ethersproject/abstract-signer");
+```
 
 License
 -------

packages/address/README.md

@@ -1,15 +1,33 @@
 Ethereum Address Utilities
 ==========================
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is responsible for encoding, verifying and computing checksums for
+Ethereum addresses and computing special addresses, such as those
+enerated by and for contracts under various situations.
 
-API
----
+For more information, see the [documentation](https://docs.ethers.io/v5/api/utils/address/).
 
-`@TODO`
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    getAddress,
+    isAddress,
+
+    getIcapAddress,
+
+    getContractAddress,
+    getCreate2Address
+
+} = require("@ethersproject/address");
+```
 
 License
 -------

packages/asm/README.md

@@ -205,6 +205,7 @@ Building
 If you make changes to the `grammar.jison` file, make sure to run the `npm generate`
 command to re-build the AST parser.
 
+
 License
 =======
 

packages/base64/README.md

@@ -29,7 +29,6 @@ console.log(encodedData);
 // "..."
 ```
 
-
 License
 =======
 

packages/basex/README.md

@@ -1,5 +1,31 @@
-Base X
+Base-X
 ======
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
+It is responsible for encoding and decoding vinary data in arbitrary bases, but
+is primarily for Base58 encoding which is used for various blockchain data.
+
+For more information, see the [documentation](https://docs.ethers.io/v5/api/utils/encoding/).
+
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    BaseX,
+
+    Base32,
+    Base58
+
+} = require("@ethersproject/basex");
+```
+
+License
+-------
+
+MIT License

packages/bignumber/README.md

@@ -1,15 +1,39 @@
 Big Numbers
 ===========
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is responsible for handling arbitrarily large numbers and mathematic operations.
 
-API
----
+For more information, see the documentation for [Big Numbers](https://docs.ethers.io/v5/api/utils/bignumber/)
+and [Fixed-Point Numbers](https://docs.ethers.io/v5/api/utils/fixednumber/).
+
+
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    BigNumber,
+
+    FixedFormat,
+    FixedNumber,
+
+    formatFixed,
+
+    parseFixed
+
+    // Types
+
+    BigNumberish
+
+} = require("@ethersproject/bignumber");
+```
 
-`@TODO`
 
 License
 -------

packages/bytes/README.md

@@ -1,15 +1,62 @@
-Byte Manipulation Libraries
-===========================
+Byte Manipulation
+=================
 
-**EXPERIMENTAL**
+This sub-module is part of the [ethers project](https://github.com/ethers-io/ethers.js).
 
-Please see the [ethers](https://github.com/ethers-io/ethers.js) repository
-for more informations.
+It is responsible for manipulating binary data.
 
-API
----
+For more information, see the [documentation](https://docs.ethers.io/v5/api/utils/bytes/).
+
+
+Importing
+---------
+
+Most users will prefer to use the [umbrella package](https://www.npmjs.com/package/ethers),
+but for those with more specific needs, individual components can be imported.
+
+```javascript
+const {
+
+    isBytesLike,
+    isBytes,
+
+    arrayify,
+
+    concat,
+
+    stripZeros,
+    zeroPad,
+
+    isHexString,
+    hexlify,
+
+    hexDataLength,
+    hexDataSlice,
+    hexConcat,
+
+    hexValue,
+
+    hexStripZeros,
+    hexZeroPad,
+
+    splitSignature,
+    joinSignature,
+
+    // Types
+
+    Bytes,
+    BytesLike,
+
+    DataOptions,
+
+    Hexable,
+
+    SignatureLike,
+    Signature
+
+} = require("@ethersproject/bytes");
+```
 
-`@TODO`
 
 License
 -------

packages/cli/README.md

@@ -12,6 +12,7 @@ and debug Ethereum-related tasks using the ethers.js library.
 
 -----
 
+
 Sandbox Utility
 ===============