dotcloud/docker — pull request #3963 by unclejack (2014-02-06 09:14:44+00:00)
Title: update issue filing & PR submission instructions

This updates CONTRIBUTING.md:
- ask those who file issues to provide the full output of `uname -a` and to provide the steps to reproduce the issue if that's applicable and possible
- update the guidelines for sending PRs to make it clear that PRs may not contain commits from other users or from other branches