Release process

Whenever you need to release:

1. Ensure rake test is green
2. Check that README.md is updated if need be
3. Use http://semver.org/ for choosing next version number
4. Make a separate commit bumping gemspec's version called Release <x.x.x>
5. Tag it with <x.x.x> (not v<x.x.x>)
6. Push tags
7. Merge the tag into master
8. Build the gem and push it to rubygems (you might need some setup if doing it for the first time)
9. If in doubt, call Den