Add a fallback to find show_id

First, instead of trying to find exactly the show in the search, settle
on a name that starts with the show title we have found.
If it can't be found, look at the list of all the shows and try to find
the show name (exactly this time).

If it's still is not found, well... no luck !
Improve the way to find TVShow title

Previously, we tried to find a TVShow title using only regexes, now, we
first try to find it in XBMC's Library, and only if there is nothing in
there, try to find it using the filename.

It should resolves issues with people organizing their library and thus
using generic filename such as S01E01.mkv
New version 1.0.7