Formula Editor Item
added item to the click-event of the bricks which have an formula edit
field
JUnit-Test added
for the menu item edit formula
Changed draw method for shaders
added ShaderBatch.java
checked test, which failed on jenkins
Merge with master
Function getFormula() is now part of the interface FormulaBrick
deleted comments
Merge branch 'master' into EditFormulaItemOnClickBrick

Conflicts:
	catroid/src/org/catrobat/catroid/ui/adapter/BrickAdapter.java
Merge branch 'master' into Issue#42
Some changes with the ShaderBatch
removed MergeConflict in BrickAdapter
added new JUnit-Test-Class for testing all FormulaBricks
added licensheader and deleted logs and spaces
Merge branch 'master' into Issue#42
Added a private Shader Class to Look
Fix a bug with reloading the stage and some code refactoring
Removed adjustBrightness method
Merge branch 'master' into Issue#42
Merge branch 'master' into Issue#42