Add the list of contributors

Add the list of contributors in a separate file and add links
to the LICENSE and CONTRIBUTORS files.

Fixes #4

CONTRIBUTORS

@@ -0,0 +1,11 @@
+# The list of people who have contributed code to the cmux repository.
+#
+# Auto-generated with:
+#		git log --oneline --pretty=format:'%an <%aE>' | sort -u
+#
+Dmitri Shuralyov <shurcooL@gmail.com>
+Ethan Mosbaugh <emosbaugh@gmail.com>
+Soheil Hassas Yeganeh <soheil.h.y@gmail.com>
+Soheil Hassas Yeganeh <soheil@cs.toronto.edu>
+Tamir Duberstein <tamir@cockroachlabs.com>
+Tamir Duberstein <tamird@gmail.com>

README.md

@@ -63,3 +63,10 @@ example of this approach.
 when it's accepted. For example, one connection can be either gRPC or REST, but
 not both. That is, we assume that a client connection is either used for gRPC
 or REST.
+
+# Copyright and License
+Copyright 2016 The CMux Authors. All rights reserved.
+
+See [CONTRIBUTORS](https://github.com/cockroachdb/cmux/blob/master/CONTRIBUTORS)
+for the CMux Authors. Code is released under
+[the Apache 2 license](https://github.com/cockroachdb/cmux/blob/master/LICENSE).