Fix crash in case the .imgur file doesn't exist
Call callback in case the entry already exists
Don't call cb if it isn't given
Hide the content until the scripts are loaded
Rename function to reflect body more clearly
Factor posting out of the messagehandler
Make nyaa link detection more generic
Change base url to use nyaa.se
Remove left over parts of caching

This caused the memory leak over time.

Finally closes #14 for good.
Add missing semicolon
Add missing var