Step 1 of the TheGamesDB interface rewrite
Querying TheGamesDB now works, but some platform names are not valid (for example Game Boy Advance in Phoenix vs Nintendo Game Boy Advance on TGDB)
Grab the game artworks from the online database (currently only TheGamesDB).
Added the other platforms to the TheGamesDB platforms map
Merge pull request #21 from Subv/master

Rewrite of the TheGamesDB scrapper handling.