Merge pull request #12 from thecity/jasonh/enhance_checkins_and_add_legit_testing

Jasonh/enhance checkins and add legit testing
Get coveralls coverage to actually show up
Still trying to get coveralls to work
More work to try to get coveralls to register
Never mind, need pry in test...
I think pry is causing the problem, so no more using it in test...
Maybe it's the tty?
add jruby-head just to see what happens...
Turn tty back on since that isn't the issue
Implementing groups/checkin_events#index endpoint
Implemented groups/checkins#show, groups/checkins/by_pager_number, and groups/checkins/by_callboard_number
Getting rid of pending test cruft