Add option to display episode number before title

[maxpiva]

Thanks for your support :), We might move this to the server (ShokoServer) instead of doing of the client, since the client is only a proxy. This is because some clients Numerate the episodes others like (ios) not, so we can fine-tune when to add the episode number to the title.

[Kurounin]

That would be ideal. I implemented it this way since it was an easy enough change and I wanted to be able to use it quickly. Thanks for taking this into consideration.