adds ice_cube and recurring_select
adds tests for schedule model handling recurring huddles
adds recurring_role to huddle, feature tests for recurring option
stores temporal phrase in huddle.recurring_rule
recurring_rule stored and useable by IceCube
refactor new_user_sees_creates_huddle
changes occurrences datatype to text, adds tests for time update
recurring huddles updating, expired huddles deleted
Merge pull request #10 from BaltimoreBirds/allow_for_recurring_huddles

Allow for recurring huddles