updated guessit and babelfish minimum requirements
Eliminated Dict Comprehensions (PEP 274) references to allow subliminal to work with python v2.4+
applied guessit v0.7 support
allow searching for subtitles by best score; not exclusively hearing impaired (HI) or non-HI
subliminal bugfix to prevent multiple matched subtitles from different providers being downloaded.  Just download 1 (the best matched); bugfix
added ability to prioritize multiple matched subtitles; Download Hearing Impaired (HI) first before non-HI or vs versa. This is kind of an extension to the bestscore enhancment already added in a previous commit.
added graceful handling of subtitle providers that are simply offline or unavailable.
podnapisi website changes maded in Aug 2014 broke this provider in subliminal. Provider now supports new page layout