Getting lots of "undefined" entries from Anidb

[tknx]

This is happening for a bunch of shows whether I use name matching or Anidb matching.

[nalsai]

Same issue as #39.
You got banned from the API, as it is very restrictive and you now have files that just contain <error code="500">banned</error> in the cache for anidb. They will only be replaced if you try again in a week, or you manually delete them.
Some info on the size of your library and how many files you recently scanned would be nice.

#43 is also about this issue.