Import comforming to Python standards.
Merge pull request #118 from boudewijn-tribler/parallel-callback

Import comforming to Python standards.
Merge pull request #119 from boudewijn-tribler/bugfixes

Improve unittest runtime.
Merge pull request #120 from boudewijn-tribler/bugfixes

More unittest performance improvements.
Remove tunnel prefex before converting to meta.