docs: updated installation instructions in README.md (#106)

README.md

@@ -15,3 +15,81 @@ This code generation is used to achieve:
 - other serialization formats
 
 More information in the [original readme](https://github.com/gogo/protobuf/blob/master/README).
+
+## Getting Started
+
+There are several ways to use gogoprotobuf, but for all you need to install go and protoc.
+After that you can choose:
+
+  - Speed
+  - More Speed and more generated code
+  - Most Speed and most customization
+
+### Installation
+
+To install it, you must first have Go (at least version 1.6.3 or 1.9 if you are using gRPC) installed (see [http://golang.org/doc/install](http://golang.org/doc/install)).
+Latest patch versions of 1.12 and 1.15 are continuously tested.
+
+Next, install the standard protocol buffer implementation from [https://github.com/google/protobuf](https://github.com/google/protobuf).
+Most versions from 2.3.1 should not give any problems, but 2.6.1, 3.0.2 and 3.14.0 are continuously tested.
+
+### Speed
+
+Install the protoc-gen-gofast binary
+
+    go get github.com/cosmos/gogoproto/protoc-gen-gofast
+
+Use it to generate faster marshaling and unmarshaling go code for your protocol buffers.
+
+    protoc --gofast_out=. myproto.proto
+
+This does not allow you to use any of the other gogoprotobuf [extensions](https://github.com/cosmos/gogoproto/blob/master/extensions.md).
+
+### More Speed and more generated code
+
+Fields without pointers cause less time in the garbage collector.
+More code generation results in more convenient methods.
+
+Other binaries are also included:
+
+    protoc-gen-gogofast (same as gofast, but imports gogoprotobuf)
+    protoc-gen-gogofaster (same as gogofast, without XXX_unrecognized, less pointer fields)
+    protoc-gen-gogoslick (same as gogofaster, but with generated string, gostring and equal methods)
+
+Installing any of these binaries is easy.  Simply run:
+
+    go get github.com/cosmos/gogoproto/proto
+    go get github.com/cosmos/gogoproto/{binary}
+    go get github.com/cosmos/gogoproto/gogoproto
+
+These binaries allow you to use gogoprotobuf [extensions](https://github.com/cosmos/gogoproto/blob/master/extensions.md). You can also use your own binary.
+
+To generate the code, you also need to set the include path properly.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/cosmos/gogoproto/protobuf --{binary}_out=. myproto.proto
+
+To use proto files from "google/protobuf" you need to add additional args to protoc.
+
+    protoc -I=. -I=$GOPATH/src -I=$GOPATH/src/github.com/cosmos/gogoproto/protobuf --{binary}_out=\
+    Mgoogle/protobuf/any.proto=github.com/cosmos/gogoproto/types,\
+    Mgoogle/protobuf/duration.proto=github.com/cosmos/gogoproto/types,\
+    Mgoogle/protobuf/struct.proto=github.com/cosmos/gogoproto/types,\
+    Mgoogle/protobuf/timestamp.proto=github.com/cosmos/gogoproto/types,\
+    Mgoogle/protobuf/wrappers.proto=github.com/cosmos/gogoproto/types:. \
+    myproto.proto
+
+Note that in the protoc command, {binary} does not contain the initial prefix of "protoc-gen".
+
+### Most Speed and most customization
+
+Customizing the fields of the messages to be the fields that you actually want to use removes the need to copy between the structs you use and structs you use to serialize.
+gogoprotobuf also offers more serialization formats and generation of tests and even more methods.
+
+Please visit the [extensions](https://github.com/cosmos/gogoproto/blob/master/extensions.md) page for more documentation.
+
+Install protoc-gen-gogo:
+
+    go get github.com/cosmos/gogoproto/proto
+    go get github.com/cosmos/gogoproto/jsonpb
+    go get github.com/cosmos/gogoproto/protoc-gen-gogo
+    go get github.com/cosmos/gogoproto/gogoproto