Demo patch 0.2a: Added reroll feature and many sound fixes

- Added a reroll feature. No idea who will win? You can now reroll the random armies max 3 times during a game. - Fixed many sound issues. - Fixed bug with priest not being able to be on green team in simulator. - Added a units button to the top left during battle, which enables you to pause and read info about the armies. - Added popup explanation to casual auto play option in settings: “When enabled right or left army will automatically be chosen when playing on casual. 20 rounds will thus be played without any input required.“