pre-spring end of winter resource cleanup
recycling of TypedArray leads to color chooser crash
added crop, rectangle, bucket tool help tests
even more resource cleanup and (current) full translation EN->DE
some missing strings
removed english strings in fr and tr string xml
Merge pull request #69 from Catrobat/pre_spring_cleanup

Pre spring resource cleanup
implementation: @mgerald [gm]
acceptance: @galstc05 [sg]