refactored excessive bitmap copy in stamp tool
refactored all drawingSurface.getBitmapCopy().getPixel to
drawingSurface.getBitmapPixelColor
fixed test, renamed drawingSurface.getBitmapPixelColor to getPixel
Merge branch 'master' of local repository into refactor_excessve_bitmap_copy
FillToolIntegration test: added a more dynamically check for the fill
timeout (instead of hardcoded solo.sleep)
reused waitForProgressDialog for stamp tool
removed stamp tool log, added method to check if old bitmap is good
enough
avoided some more unnecessary bitmap access
improved stability of crop tool test for different devices a little
CropTool-removed BitmapCommand before CropCommand improved stability of
crop tool tests a little
improved stability of DrawingSurface and some tests
Merge branch 'master' of local repository into refactor_excessve_bitmap_copy
merged with master
--newlines
icon update
Merge pull request #82 from Catrobat/refactor_excessve_bitmap_copy

Refactor excessive bitmap copy
Implementation: @mgerald [gm]
Acceptance: @galstc05 [sg]