Test fixed

RenameSpriteDialogTest fixed

LookFragmentTest fixed

remove unused import
fix IndexOutOfBoundsException

happend if PocketCode folder wasn't empty but didn't contain
a valid structured project
Merge pull request #1106 from Catrobat/fixFaultyStartup

fix IndexOutOfBoundsException
fix LoopBrick-Tests
fix ProjectActivity Test
Merge pull request #1108 from Catrobat/thomas-testfix

fix ProjectActivity Test
[CAT-1095] FormulaEditorComputeDialog closes on inside click.
Merge pull request #1107 from Catrobat/CheckLoopBrickTest

fix LoopBrick-Tests
Merge pull request #1103 from Catrobat/fixingTests

org.catrobat.catroid.uitest.ui.fragment.LookFragmentTest#testItemClick is failing, although locally tested it works fine. Will merge this anyway, as the other tests are fixed.
Merge pull request #1079 from Catrobat/CAT-1095

[CAT-1095] FormulaEditorComputeDialog closes on inside click.
CAT-1095 #fixed
Update README.md