Decode UTF8 characters in TheMovieDB JSON reply.

I didn't notice this during testing but it seems the results are being UTF8 encoded by OpenDB. The results from TheMovieDB are already UTF8 encoded which causes issue with double encoding. Decoding the values first allows UTF8 encoded characters to be displayed correctly.

I could also be totally wrong and not understand UTF8 encoding properly (never really had to worry about it before). :)