Created History class. Started work on controls to switch to history.

Change-Id: I36d6678b8e02802cb2bd72e1c47e1bda6893dc91
Added HistoryCard class.

Change-Id: I3811b55e1dbba483164643e30b92e59669b26f2e
Merge pull request #97 from mikeyman77/ui/history

Created History class. Started work on controls to switch to history.