Changed textarea to text pane.
added color display for Main,Upcoming, floating widgets. 
predefined color for task title and task title background.
random color for task details. e.g. start time , end time.
reference:
http://stackoverflow.com/questions/18215942/coloring-a-string-before-adding-it-to-a-jtextarea?lq=1
Merge branch 'testingColorDisplay'