Added versioning
corrected version number
Updated likes methods with before and after filters
Merge branch 'master' into likes-before-after

Conflicts:
	pytumblr/request.py
added test coverage with before and after parameters for blog likes
added test coverage with before and after parameters for user likes
Merge pull request #59 from tumblr/likes-before-after

Updated library to support the new before and after parameters for likes