Make a start on proper rdoc documentation.
Mention rake docs in README.
Merge pull request #51 from aprescott/rdoc

Make a start on proper rdoc documentation
Allow rdoc task as an alias of docs.
Add rdoc 4.0.0 dependency and bundle update.
Add Code Climate badge
Fix typo in CHANGELOG.
Merge branch 'master' into name-conflicts

Conflicts:
	CHANGELOG.md