Create trakt_remove.py

I created trakt_remove.py as discussed here : https://github.com/Flexget/Flexget/pull/88
I've debugged and tested it and it's working fine for movies, I didn't developped it for TV Shows yet as it doesn't seems really necessary.
With this plugin you can ask trakt.tv to remove collected movies from a list (Watchlist or custom).
The code is practically entirely based on trakt_acquired, I just changed the post_url and change the JSON item to respect trakt.tv API : http://trakt.tv/api-docs/lists-items-delete

I hope you'll find this usefull!
Update trakt_remove.py
Update trakt_remove.py

Added watchlist movie support
Change imdb parsing utils to BS4
Remove BeautifulStoneSoup from TVDB API
Remove BeautifulStoneSoup from TVDB Favorites
Remove BS3 from dependencies
Merge pull request #98 from Flexget/deprecate_bs3

Deprecate BeautifulSoup 3
Handle cases where a series doesn't have a FirstAired date listed. Fixes #2285
Update trakt_remove.py
Merge pull request #90 from niawag/patch-4

Create trakt_remove.py
Fix possible crash when validating quality requirements.
Handle cases where a series doesn't have a FirstAired date listed
Merge pull request #110 from Flexget/handle_no_firstaired

Handle cases where a series doesn't have a FirstAired date listed
Fix string formatting error
Change log levels in html input plugin
Less verbosity for IMDB and TMDB lookups
Correcting recursion
Allowing to resume
Adding connexion status tests
Functionnal version. Remains some fail test