Added ability to compute board hash. Displays the hash in the status box
Merge branch 'develop' into feature/Detect_Stable_State
Removed counting of alive cells for the purpose of stopping when the board is dead.  Instead check the known hash for dead cell state.
Finished detection of 2 cycle stable state.  Figured it's not really worth it going for 3, since it would have to work WITH 2 cycle states, which would probably mean checking for 6 cycles, At which point there would likely be spaceships anyways.
Merge branch 'feature/Detect_Stable_State' into develop