Added physic shape builder strategies A and B.
mend
Fix turn left/right speed brick layout.
Fix shape change bug of PhysicShapeBuilderStrategyFastHull.
Fix PhysicBrickPreparatorTest.
Replace member Vector2 with float x,y from SetVelocityBrick because not 'serializable'.
Allow decimal turn left/right speed brick.
Create new package for PhysicShapeBuilder classes.
Merge branch 'master' into PhysicsPainsi
Clean up boundary box.
Merge branch 'master' into PhysicsPainsi

Conflicts:
	catroidTest/src/org/catrobat/catroid/test/utiltests/UtilFileTest.java
Merge branch 'master' into PhysicsPainsi
Merged with master.
Refactor physic brick UI tests.
Refactor physic brick xml layouts.
Merge branch 'master' into PhysicsPainsi
Remove failing testcase.
Fix all physic depending issues of jenkin testrun http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/117/

Refactor physic brick layout.
Add/Correct license in physic depending files. ()
Merge branch 'master' into PhysicsPainsi
Merge branch 'master' into PhysicsPainsi
Merge remote-tracking branch 'origin/PhysicsPainsi' into PhysicsPainsi
Add error message to all asserts.
Remove unused physic classes.
Fixed asserts and missing error messages in physic files.
Add x_label string.
Fix gravity and velocity layout.
Introduce unused strings.
Remove unused System.outs