Update build.xml

Change name grom MainActivity to UrbanGame
Bug fixes + tests. (only for raw task, needed to implement player
specific task infromations -> request with that soon, tonight I think)
Closing db method, that fixes problem of unclosed exeption(sqlcipher
issue)
All tests ready.
Everything is tested, passes the tests and it's ready to use.
Merge pull request #35 from herbatnik/android

[Android][URBNG-278] Bug fixes + tests. All ready