Ignore .bak files
Converted to Python 3

tv has now been converted to Python 3. As part of this the timestamp
cache is now stored as JSON instead of the pickle format.
Remove uncommented lines

After the 2to3 conversion these lines were no longer valid code anyway,
so they should just be deleted
Group imports
Fix progress notification

I wonder how this ever worked. Maybe Python 2 handled it differently.
Fix sorting of show list when API call fails
Merge pull request #7 from SteffenBach/python3

Convert to Python 3. Fixes #6.