Implemented task count in calendar

I added new UI elements into each cell so that the UI can display the
total number of tasks associated to the day. I also made changes to the
project so that the external libraries can be used.

Changes:
-> Added new elements to the UI class
-> Added additional handlers for these new elements

Fixes:
-> Renamed the external library folder to standard
-> Fixed the classpath so that the project can compile
Additional changes not committed with the prev set

Additional changes that github detected after my previous commit.

Refer to my previous change.