Fixed issue with FillTool
Added integration test for clicks out of bound
Made CropTool a little bit nicer to look at
Restore ToolState after switch to/from MoveTool
Implemented Zoom-In and Zoom-Out buttons for MoveZoomTool
Integration-tests for zoom-in and zoom-out
Added toolSwitch integration test
Added some sleeps() for jenkins
Fixed toolSwitch issue with move and zoom tool
Fixed testing-bug
Trying to fix memory issue on jenkins
Added test case for tool-switching
Refactoring
Merge pull request #77 from Catrobat/I60_ImportPNG

I60 import png
Implementation: @michaelmuenzer [mm]
Acceptance: @galstc05 [sg]