straight line tool without tests
Merge branch 'master' into P11.01_straight_line
merged master
master merge
first test
tests added
Merge branch 'master' into P11.01_straight_line
Merge branch 'master' into P11.01_straight_line
Slight renaming in test
Test in fullscreen to avoid coordinate problems
Straight line tools are green now, but could be refactored and extended
Merge branch 'P9.01_straight_line' of github.com:Catrobat/Paintroid into P11.01_straight_line
added sleep after going to fullscreen in tests (failed in jenkins because fullscreen was not 'full'
line tool/fullscreen tests are now flaky
merged master
line tool icon suggestions
line tool icon suggestions added pngs
new string menu_export if opened from catroid
Update string.xml
Link correction.

The "About" url points now to our promotional main catrobat.org webpage
(the www... version) instead of the developer.catrobat.org pages.