Zen Mode Added (and Endless Mode changed)

Now the game is split off into two modes Endless Mode (or Normal Mode) which will hide the play area when you pause and Zen Mode that won't hide the play area when you pause.  This is because some people thought it was cheating to be able to pause and map out your next move and other people just loved playing this way!  This way both types of players (and maybe the same players when they are in different moods) get what they want.  Also, the High Score is tracked separately for each mode since this does give you an advantage.  

We also fixed a bug where the game would crash if you paused while the words were clearing.

Hope you enjoy!