Added CONTRIBUTING.md

Change-Id: I4902f08d95fae716c388eafa1f7272f274f0bfb5

CONTRIBUTING.md

@@ -0,0 +1,27 @@
+Want to contribute? Great! First, read this page (including the small print at the end).
+
+### Before you contribute
+Before we can use your code, you must sign the
+[Google Individual Contributor License Agreement]
+(https://cla.developers.google.com/about/google-individual)
+(CLA), which you can do online. The CLA is necessary mainly because you own the
+copyright to your changes, even after your contribution becomes part of our
+codebase, so we need your permission to use and distribute your code. We also
+need to be sure of various other things—for instance that you'll tell us if you
+know that your code infringes on other people's patents. You don't have to sign
+the CLA until after you've submitted your code for review and a member has
+approved it, but you must do it before we can put your code into our codebase.
+Before you start working on a larger contribution, you should get in touch with
+us first through the issue tracker with your idea so that we can help out and
+possibly guide you. Coordinating up front makes it much easier to avoid
+frustration later on.
+
+### Code reviews
+All submissions, including submissions by project members, require review. We
+use Github pull requests for this purpose.
+
+### The small print
+Contributions made by corporations are covered by a different agreement than
+the one above, the
+[Software Grant and Corporate Contributor License Agreement]
+(https://cla.developers.google.com/about/google-corporate).

README.md

@@ -1,6 +1,7 @@
 # go-frp - Functional Reactive Programming in Go
 
 ## Status
+[![GoDoc](https://godoc.org/github.com/gmlewis/go-frp?status.svg)](https://godoc.org/github.com/gmlewis/go-frp)
 [![Build Status](https://travis-ci.org/gmlewis/go-frp.png)](https://travis-ci.org/gmlewis/go-frp)
 
 ## Overview