Add symlink tarpc/README.md -> README.md

external_doc doesn't work with crates.io yet :(

Prepare for release

Bump version (google#195)

Minor change rollup

* Head off imminent breakage due to rust-lang/rust#51285.
* Fix examples and documentation to use a recently-gated feature, `proc_macro_path_invoc`.
* Update dependency versions.

Merge pull request google#183 from tikue/fix-breakage

Fix breakage on most recent nightly.

Merge pull request google#167 from tikue/master

* Fix breakage from nightly compiler changes.

* Remove unused imports

* Update TLS code to not use deprecated method

* Bump versions

Fixes google#166

Update to serde 1.0 and bincode 0.8 (google#149)

Bump to version 0.7.3 and update release notes.

Merge pull request google#145 from tikue/master

Bump version