Convert scss.erb file to scss file
Add support for IceCube::Rule.until

Add an extra input that takes a date in user-specified format that can
be specified using RecurringSelect.date_format= (defaults to :db format
%Y-%m-%d). Add jQuery UI as a dependency for the datepicker.
Merge branch 'until_time_input'
Add 'until' functionality.
The form element should work on a date, not a hash.
Better structure around indefinite checkbox to allow easy formatting.
Fix parsing to use Time.zone.parse.