Added correct Content-Type header to showPoster calls.
Merge branch 'api-fixes'
Fix Provider Priorities tab when torrents disabled

As mentioned here: https://sickrage.tv/forums/forum/main-category/latest-news/8894-feedback-on-new-skin?p=11942#post11942

Don't know if there's a better way to fix it.
Merge tag 'v3.3.3' into develop

Tagging version v3.3.3 v3.3.3
Merge pull request #967 from fernandog/patch-9

Fix Provider Priorities tab when torrents disabled
Merge remote-tracking branch 'upstream/master'

Conflicts:
	sickbeard/webserve.py
Add more info to api command show
Merge pull request #973 from Hellowlol/apishowmore2

Add more info to api command show
Overhaul of Trakt.TV API handler
Quickfix for last commit of Trakt.tv overhaul
Downgraded Trakt errors to trigger SR logger WARNINGS instead of ERROR messages
Name change XBMC -> Kodi
Update contributing.md
Fix for missing kodi module
Merge remote-tracking branch 'origin/develop' into develop
Fix for missing kodi metadata modules
Added new kodi notifier icon to replace old xbmc one
Fix for issue #891 - Trakt notifications failing
Fix for issue #928 - Regex updated to take into account possible parentheses surrounding the season/episode numbers in searches
Fixed more issues with TraktAPI code