first commit in the refactoring attempt to remove if branching in the TrackedCard#add method
more refactoring on the classes born under Tracking and fixing specs
moving on on the refactoring: introduced a better tracking factory, based on a hashmap of regexp and resulting tracking classes. Also introduced the Tracking namespace under lib
Merge branch 'master' of github.com:xpepper/trello_effort_tracker into refactoring_tracked_card
Merge branch 'master' into refactoring_tracked_card
Merge branch 'refactoring_tracked_card'

Conflicts:
	spec/spec_helper.rb