New feature: find instances of dvdrip in filenames to determine if 'dvd' or 'aired' ordering should be used when retrieving info from tvdb.
Also, minor refactoring.
fall back on 'aired' ordering when dvd ordering is not avaiable on tvdb
fix error when raising invalid exception
version no bump
Merge branch 'release-1.1'
The parser now looks for instances of 'dvdrip' and 'dvd rip' in path names. This is used to determine whether to use dvd ordering when looking up episode numbers on the tvdb if available.

+ some small fixes