Removed redundant call to helpers.mapIndexersToShow.
Added failed download API.
Added backlog API.
Fixed issues caused by new encodingKludge code that was causing errors to be thrown due to function structure being incorrect.
Merge tag 'v3.9.2' into develop

Tagging version v3.9.2 v3.9.2
Added Esquire Network Logo
Added Smithsonian Channel Logo
Add custom nzb category and torrent label for anime
Merge pull request #961 from h3llrais3r/anime-category-and-label

Add custom nzb category and torrent label for anime
Merge pull request #960 from vmtyler/master

Added Smithsonian Channel and Esquire Network Logos
Merge pull request #949 from frdfsnlght/api-fixes

Added features for web api
Added code to set proper content-type header on images being displayed via webgui
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.
Reverted changes made to Tornado source code, caused a bad file descriptor error
Fixed webapi jsonp response code
Fixed bad file descriptor for Tornado
Merge remote-tracking branch 'origin/develop' into develop
Merge branch 'release/v3.3.3'
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