New opponents and support for tablets

Seven new opponents are added.
Added panic button. Press Q to quit the game. Don't let them catch you playing at work!
Support for touch screens are added. Pressing more than 1 second shows the description of the card.
Now control also works as secondary mouse button; preparing support for Apples (MAC).
A crashing when creating a new game is fixed.
An exploit that allow to have infinite money is fixed. Tell me if you want it back.
Units in agony now cannot regenerate making the reaper very scary against trolls.
The easier difficulty now is beginner and has unlimited attempts.
And some more that I don't remember.