add proguard config - optimizing code and delete logs
Merge pull request #811 from Catrobat/proguardConfig

add ProGuard config for Optimization and removing Logs
bricks, utils and layouts copied
modified files that could cause merge conflicts
testclasses copied
bugfix - wrong bitmask used
removed unused variable
trying to suppress hardcoded ip waring, using //nopmd
removed sprite parameter from led action