Copying Sprites didn't copy the local variables

 * this fix will copy the local variables in the Sprite.clone() method
 * tested in new SpriteTest.testSpriteCloneWithLocalVariable() method
Merge pull request #625 from Catrobat/fixCopySpriteVariable

Copying Sprites didn't copy the local variables
Fix issue#506
Wrote tests for SpeakStage and OnUtteranceCompletedListenerContainer
SpeakBrick generates a soundfile that is played back now
Merge pull request #627 from Catrobat/issue#506

Fix issue#506
WebView improvements
Actionbar is hidden;
History implemented (by pressing Back button);
Return to PocketCode by pressing PocketCode logo in WebView
Merge pull request #629 from Catrobat/webview

WebView improvements
Merge branch 'master' into SOR-facedetection

Conflicts:
	catroid/src/org/catrobat/catroid/stage/PreStageActivity.java
fixed imports