Added swingx to Calendar lib.
Added a DatePicker Panel
Replaced JCalendar with DatePickerPanel

DatePickerPanel isn't displaying month view yet
Added Color stuff for DatePickerPanel
date picker displays 1 month, allows selection of range of dates
Allow selecting multiple days at a time.
Merge branch 'dev' of https://github.com/CS3733Team1/wpi-suite into feature/DatePicker
Merge branch 'dev' of https://github.com/CS3733Team1/wpi-suite into feature/DatePicker
Merge branch 'dev' of https://github.com/CS3733Team1/wpi-suite into feature/DatePicker
yearview shows events
Revert "removed CategoryEntityManager from ManagerLayer for now"

This reverts commit 93e1247b7b252ae28481c85a698545fbcc88234f.
able to flag days with events in year view
Merge remote-tracking branch 'origin/dev' into feature/yearviewevent
added ReturnDates method to DatePickerPanel that returns all selected dates
yearview shows events
able to flag days with events in year view
Added Method called getEvent to return event object
Added Method called getEvent to return event object
Merge branch 'dev' into feature/DatePicker
Tests on Event Getters and Setters