Update pocketcode

Several things are changed:
- update manifest to API 9 as discussed because of missing gyro sensors on API 8
- inserted new launcher icon
- Renamed directory from "pocketcode" to "Pocket Code" --> We should also adapt this on Jenkins

testrun:
http://catrobatgw.ist.tugraz.at:8080/job/Catroid-custom-branch-test/1124/