new string menu_export if opened from catroid
Update string.xml
Merge branch 'master' of https://github.com/Catrobat/Paintroid into rename_save_image
Merge branch 'rename_save_image' of
https://github.com/Catrobat/Paintroid into rename_save_image

Conflicts:
	Paintroid/res/values-de/string.xml
Merge pull request #180 from Catrobat/rename_save_image

Rename save image
acceptance: @galstc05 [sg]
implementation: @X4mp