[roidy]

However this also includes a little something extra (just for you ). 
I took your request for the extra episode thumbnails, and combined it with my random musings on the append_to_response to fetch the episode art in batches of about 10 episodes each per season (it groups them on the tens digit, so 1-9, 10-19, etc.)  I was able to do it that way without using xslt.  It also means I could add the external ids on as well and still be under the 20 append limit (I haven't done that yet, though).

Obviously that's going to add a few more requests per scan.  But a full scan would also spend 9(ish) episodes using the cache before the next request, so hopefully it should keep the rate-limit at bay. 
I managed a full scan of One Piece (19 seasons, 838 episodes) with 127 cached files, and never hit the limit.

Will this change back to multiple episode image make it's way back into the main repo? I was extremely disappointed when Kodi suddenly stopped fetching all the episode images, that's one of the big reasons for using TMDB over TheTVDB, all the nice episode images to choose from.