add move/zoom tool
add icons and new class
implementend move test
fixed preferences test
fixed movezoomtest
Merge pull request #34 from Catrobat/8.xx_move_zoom_tool

8.xx move zoom tool
acceptance: @schmidiM [MS]
implementation: @galstc05 [SG]
removed comments
Merge remote-tracking branch 'origin/master' into 8.31_to_8.36_ColorChooser_refactoring
20 colors in preselection