Use ProtoInfo instead of legacy .proto attr (bazelbuild#211)

* Use ProtoInfo instead of legacy .proto attr

bazelbuild/bazel#7152

Get stardoc working and update docs. bazelbuild#140 (bazelbuild#174)

Define the toolchain_type used by rust rules. (bazelbuild#129)

Fixes bazelbuild#128.

Update Rust to 1.24.1 (bazelbuild#77)

* Update Rust to 1.24.1

* Update repositories.bzl

Update documentation for 0.0.5 release. (bazelbuild#32)

Update documentation for 0.0.4 release. (bazelbuild#30)

Update to Rust 1.11. Bump version for rules_rust in README to 0.0.3. (b…

…azelbuild#22)

Update to Rust 1.9. (bazelbuild#10)

Initial version