Incorporated jQuery DataTables and some initial CSS styling

Modified some of the HTML tables to use the jQuery DataTables plug-in,
providing an improved tablular display.

Also, added a common function to genera the head portion of a generated
HTML page, including a style sheet so that we can improve the appearance
of the overall site.
Added bluetooth server tablet application and refactored client sync

Added a bluetooth server tablet application, derived from the
BluetoothChat sample application, that will allow all tablets to sync to
a master tablet at competition. This application will simplify the sync
procedure at competition. The sync application now supports the transfer
of text files as well as JPEG media files.

Also refactored the client sync handling to use a common set of sync
utilities, and updated the ScoutingAppBase accordingly.