* README.mdown: Note that bugs can be submitted to main Emacs list.
* CONTRIBUTING.md: Fix double spacing, remove carriage returns.
Tighten up commit message example.
* CONTRIBUTING.md:
* NEWS:
* README.mdown:
* doc/index.org:
* doc/nav-menu.html.inc:
* yasnippet.el: Since the new repo destination is now under
`joaotavora', fix all the stale links to point to the new destination.
Copyright-paperwork-exempt: yes
Collect some conventions about contributing to Yasnippet (which have
been scattered amongst various issues/pull request) into a single file.
* CONTRIBUTING.md: New File.
