tests for disabled buttons, drawable addes
DisableManager added, enable/disable buttons
refactored disable button test
make DisableManager Singelton
Merge branch 'master' into 8.39P_mark_disabled_buttons
show transparency in color button
removed unnecessary test
fixed pipette tool
allow color picker dialog only for specific tools
rename and move UndoRedoManager
fixed pipetteToolTest
disableButton test changed
update immediately after color change
test changed
run commitcommand on uithread
Merge remote-tracking branch 'origin/master' into
8.39P_mark_disabled_buttons

Conflicts:
	PaintroidTest/src/org/catrobat/paintroid/test/integration/CropToolIntegrationTest.java
Merge pull request #55 from Catrobat/8.39P_mark_disabled_buttons

8.39 p mark disabled buttons
Implementation: @schmidiM
Acceptance: @PeteSVS
merged master into branch and resolved conflicts
set Statusbar to UndoRedoManager
fixed waiting test