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
changed colours
Merge branch 'master' into refactor_variable_list
layout of text fields
fixed missing translations for plural strings
merged with master
Merge branch 'master' into refactor_variable_list
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