Remove unused class
+ Added birthday picker to select month, day and optionally a year.
+ Update MonthDay and MonthYear pickers to display month abbreviation instead of number.
+ Updated NewAccount and Edit Person to use BirthdayPicker control

Fixes #122
Fix issue with context not saving
Fixes #158
Use col-sm instead of col-md in attended checkin.  Fixes the layout when using an iPad in vertical mode
Fixes #145. Batch validation should be working correctly now.
Merge branch 'develop'