Cleanup the code
Cleanup the code

* Remove the code checking for nepomuk:/me. The storage service will
  always create it.
* Remove unnecessary headers
* Avoid typing 'Nepomuk::Vocabulary::'. It makes the code look ugly.

KDE/ktp-common-internals,leonhandreke/ktp-common-internals,KDE/ktp-common-internals,leonhandreke/ktp-common-internals,KDE/ktp-common-internals,leonhandreke/ktp-common-internals