Fix fast double click buttons issue#59 in MainMenuActivity.

Add UiTestUtils methods for fast double click buttons issue#59.
Fix double click issue and add tests for new and upload button.
Add ViewSwitchLock.
Merge branch 'master' into issue#59

Conflicts:
	catroid/src/org/catrobat/catroid/ui/MainMenuActivity.java
	catroidUiTest/src/org/catrobat/catroid/uitest/ui/MainMenuActivityTest.java
	catroidUiTest/src/org/catrobat/catroid/uitest/util/UiTestUtils.java
Update MainMenuActivityTest.java
Move fast double click issue from MainMenuActivity to own TestSuite.
Derived ViewSwitchLock from Lock.
Add fast double click for all MainMenuActivity buttons.
Merge branch 'master' into issue#59

Conflicts:
	catroid/src/org/catrobat/catroid/ui/MainMenuActivity.java
Merge branch 'master' into issue#59
Merging problems
Refactor DoubleClickOpensViewOnceTest.
Refactor DoubleClickOpensViewOnceTest by giving methods a more meaningful name.
Add ViewSwitchLock tests in DoubleClickOpensViewOnceTest.
Add FastDoubleClickOpensViewOnce tests for activities.

UI Thread handles fast double click.
Activities: MyProjects, ProgramMenu, Project and Script.
Merge branch 'master' into issue#59
DoubleClickOpensViewOnceTest integration.
Merge branch 'master' into issue#59
temporarily fixes issue 81
Merge branch 'master' into issue#81
first version on testcase issue#81
Merge branch 'issue#81' of https://github.com/Catrobat/Catroid into issue#81
Fix testcase for issue#81
Refactor Paintroid file extension test.