Added Basic Bar Graph Generation Code
Merge branch 'Sumbhav' into Gennaro
Implemented line graph functionality.
Added initial functionality to the calendar button.
Changing the date in the calendar dialog now changes the date on the main menu as well.
Added view mode button functionality. Also finished implementing a feature where activities would only be displayed if they are within the previous week/month/year (depending on view mode selection - default weekly). Finally, updated the Activity class to use integers for hours, minutes, and seconds, instead of a string.
Updated Activity class to use Date object instead of LocalDateTime (for Honors Contract).
Corrected bugs with Activity and Date. Also fixed bug where view mode buttons wouldn't do anything.
Added initial graph adding functionality for testing purposes.
Added right click popup menu to graphs with Delete functionality.
Implemented Trending Button functionality and respective interface.
Working on GraphFactory. Added method to determine time spent doing an activity.
Made getSecondsSpent static.
Put LineGraph and Pair<T> into their own class files.
Working version of LineGraph