Move contributing docs to CONTRIBUTING.md
Add docs for releasing a new version
Move link references into contributing
installation and usage before sanitization
bin is not ignored
Fix docs for testing in GitHub
Release 1.2.1
Release 1.2.1
Merge pull request #292 from github/contrib-docs

Move docs on contributing
States that .wiki files are rendered using Mediawiki syntax
Merge pull request #297 from monperrus/master

States that .wiki files are rendered using Mediawiki syntax
Merge remote-tracking branch 'origin/master' into bundler-release

* origin/master:
  States that .wiki files are rendered using Mediawiki syntax
  Release 1.2.1
  Release 1.2.1
  Fix docs for testing in GitHub
  bin is not ignored
  installation and usage before sanitization
  Move link references into contributing
  Add docs for releasing a new version
  Move contributing docs to CONTRIBUTING.md

Conflicts:
	github-markup.gemspec