Test for Ride ordering

These tests check that the rides can be ordered by date or service
when listing them all.
Pass Ride ordering tests

These simple tests make sure that the previously committed tests pass
by adding the date to the Ride output and calling order on Ride with
the proper value.
Test for Service ordering

These tests ensure that the listing of services can be ordered by day
of week or starting time.
Merge branch 'master', commit '07fe1cc48a06c70a1f44557b261121a76af3d359' of http://github.com/geisler/worship_together