Started working on adding challenge date range scope to a users activities
Changed the scope of all activity lists and sums to the current users chanllenge
Refactoring how the yellow jersey is ascertained
Refactored the yellow_jersey methods to be highest kilometers and scoped by challange date
Ignored covereage directory
Changed version of ruby to 1.9.3
Merge pull request #13 from justinhennessy/jh_fix_yellow_jersey_calc_to_scope_by_challenge_dates

Refactored yellow jersey calc to scope by challenge dates