Updated README.md in order to include unstable version badge
Result needs set to null before appending numbers

Otherwise we end up with “muff1234” etc
Switch case needs to be in an else statement, otherwise we reset $result back to $kind (default in switch)
Use the already available if/else statement level
Change else if to match others in file (instead of elseif)
Add date kind
Add tests over date kind
Add integer docs
Add date docs
Merge pull request #22 from scottrobertson/fixes

Few fixes here (Urgent, current release wont work)
Merge pull request #23 from scottrobertson/fix-undefined-id and fixed conflicts