changed relevant links from catroid.org to pocketcode.org
fixes PendingIntent in notfications

fixes #630

> ```public static PendingIntent getActivity  (Context context, int requestCode, Intent intent, int flags)```
>
> **Parameters**
*requestCode*	Private request code for the sender (currently not used).

simply wrong :angry:
Merge pull request #706 from Catrobat/updatedReadme

changed relevant links from catroid.org to pocketcode.org
Remove 'Edit in Pocket Paint' from context menu

Remove 'Edit in Pocket Paint' from overflow menu

Remove unused string edit_in_pocket_paint

Although edit_in_pocket_paint is no longer used in Catroid it is still
used in the tests (LookFragmentTest) for ensuring that the string is no
longer visible. Remove variable from strings.xml and hardcode 'Edit in
Pocket Paint' in LookFragmentTest.

Change 'assertEquals' to 'assertFalse'

Revert automatically removed spaces
Merge pull request #694 from Catrobat/TooManyWaysToStartPocketPaint

Too many ways to start pocket paint

squashed and merged :)
Merge pull request #708 from Catrobat/issue#630

fixes PendingIntent in notfications
Merge remote-tracking branch 'catrobat/master' into
userbricks-pullrequest

Conflicts:
	catroid/res/values-de/strings.xml