Please read, several changes made.

Groups Tab Functionality.  Still implementing custom ListViews for both
the Groups tab and View Group page.

Also, I restructured the code, commented methods, and created several
new files preparing for database integration.  There are also TODO
comments that represent items on our checklist that need to be
completed.  

New classes:
User - Contains all user information (moved some variables and methods
out of Main)
Buddy - Object class for adding and viewing Buddies.  
Group - Object class for adding and viewing Groups
Temp_BuddyDatabase - Temporary file only! This contains a list of
strings to represent usernames in the database for testing purposes
only.

New Layout:
custom_listview_view_group.xml - Custom ListView layout for the View
Groups page

Additionally, I am aware that the SharedPreferences in User.java will
eventually be replaced by database requests where the information will
be saved on the server end.  Please ignore them for now as some of those
preferences will need to remain in tact.