Replace rand_core 0.3 with shim around version 0.4

Also disable doctests (see #619)

.travis.yml

@@ -66,8 +66,8 @@ matrix:
         # TODO: add simd_support feature:
         - cargo test --features=serde1,log
         - cargo test --examples
-        - cargo test --manifest-path rand_core/Cargo.toml
-        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features
+        - cargo test --manifest-path rand_core/Cargo.toml --tests
+        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --tests
         - cargo test --manifest-path rand_isaac/Cargo.toml --features=serde1
         # TODO: cannot test rand_pcg due to explicit dependency on i128
         - cargo test --manifest-path rand_xorshift/Cargo.toml --features=serde1
@@ -88,8 +88,8 @@ matrix:
         # TODO: add simd_support feature:
         - cargo test --features=serde1,log
         - cargo test --examples
-        - cargo test --manifest-path rand_core/Cargo.toml
-        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features
+        - cargo test --manifest-path rand_core/Cargo.toml --tests
+        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --tests
         - cargo test --manifest-path rand_isaac/Cargo.toml --features=serde1
         - cargo test --manifest-path rand_pcg/Cargo.toml --features=serde1
         - cargo test --manifest-path rand_xorshift/Cargo.toml --features=serde1
@@ -116,8 +116,8 @@ matrix:
         - cargo test --all-features
         - cargo test --benches --features=nightly
         - cargo test --examples
-        - cargo test --manifest-path rand_core/Cargo.toml
-        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --features=alloc
+        - cargo test --manifest-path rand_core/Cargo.toml --tests
+        - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --features=alloc --tests
         - cargo test --manifest-path rand_isaac/Cargo.toml --features=serde1
         - cargo test --manifest-path rand_pcg/Cargo.toml --features=serde1
         - cargo test --manifest-path rand_xorshift/Cargo.toml --features=serde1
@@ -209,8 +209,8 @@ script:
   # TODO: add simd_support feature:
   - cargo test --features=serde1,log
   - cargo test --examples
-  - cargo test --manifest-path rand_core/Cargo.toml
-  - cargo test --manifest-path rand_core/Cargo.toml --no-default-features
+  - cargo test --manifest-path rand_core/Cargo.toml --tests
+  - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --tests
   - cargo test --manifest-path rand_isaac/Cargo.toml --features=serde1
   - cargo test --manifest-path rand_pcg/Cargo.toml --features=serde1
   - cargo test --manifest-path rand_xorshift/Cargo.toml --features=serde1

appveyor.yml

@@ -37,15 +37,8 @@ test_script:
   - cargo test --features=serde1,log
   - cargo test --benches --features=nightly
   - cargo test --examples
-  - cargo test --package rand_core
-  - cargo test --package rand_core --no-default-features --features=alloc
-  - cargo test --package rand_isaac --features=serde1
-  - cargo test --package rand_xorshift --features=serde1
-  - cargo test --package rand_xoshiro
-  - cargo test --package rand_chacha
-  - cargo test --package rand_hc
-  - cargo test --manifest-path rand_core/Cargo.toml
-  - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --features=alloc
+  - cargo test --manifest-path rand_core/Cargo.toml --tests
+  - cargo test --manifest-path rand_core/Cargo.toml --no-default-features --features=alloc --tests
   - cargo test --manifest-path rand_isaac/Cargo.toml --features=serde1
   - cargo test --manifest-path rand_pcg/Cargo.toml --features=serde1
   - cargo test --manifest-path rand_xorshift/Cargo.toml --features=serde1

rand_core/Cargo.toml

@@ -19,10 +19,9 @@ appveyor = { repository = "rust-random/rand" }
 
 [features]
 default = ["std"]
-std = ["alloc"]    # use std library; should be default but for above bug
-alloc = []  # enables Vec and Box support without std
-serde1 = ["serde", "serde_derive"] # enables serde for BlockRng wrapper
+std = ["rand_core/std"]    # use std library; should be default but for above bug
+alloc = ["rand_core/alloc"]  # enables Vec and Box support without std
+serde1 = ["rand_core/serde1"] # enables serde for BlockRng wrapper
 
 [dependencies]
-serde = { version = "1", optional = true }
-serde_derive = { version = "^1.0.38", optional = true }
+rand_core = { version = "0.4" }