Do not log ERROR when show isn't in list. Log WARNING instead.

Prevents the error log in webinterface from filling up, if there are downloads in your watch folder, which aren't in SB list
Merge branch 'dev'
* Added saving of changed newznab categories in backend.
Added gui for selecting categories from multiselect box.
Created some helper function in js, for dynamically modifying selects/options

Made results of function for retrieving newznab capabilities more generic. In that now always a valid json is returned with success,tv_categories,error

Added gui elements for retrieving and displaying newznab capabilities

Added backend functions for calling ajax /getNewznabCategories?name=yourNewznabProvider&url=https://newznabprovURL&key=YourApiKey
Returns json.dumps() with TV category capabilities of newznab provider. Is going to be used for new gui element in adding newsnab provider.
Fixed some git conflicts
Testing fix for missing api key on newznab providers
Merge pull request #773 from adam111316/newznab_fix

Testing fix for missing api key on newznab providers
Fix for daily/backlog checkbox values not saving correctly on providers
Merge pull request #774 from adam111316/fix_provider_settings

Fix for daily/backlog checkbox values not saving correctly on providers
Test #2 to fix daily/backlog checkboxes with custom newznab server
Merge pull request #775 from adam111316/newznab_fix_2

Test #2 to fix daily/backlog checkboxes with custom newznab server
Fix infinite loop with dognzb
Merge pull request #778 from adam111316/dogloopz

Fix infinite loop with dognzb
Fix #3 for daily/backlog checkbox saving
Merge pull request #779 from adam111316/checkbox_fix

Fix #3 for daily/backlog checkbox saving
Added the torrent provider for www.t411.me tracker
Merge pull request #762 from dhellwich/patch-2

Do not log ERROR when show isn't in list. Log WARNING instead.
Merge pull request #769 from KontiSR/dev

Added gui for for choosing newznab (tv) categories
Merge pull request #780 from djoole/t411

Added the torrent provider for www.t411.me tracker
Merge pull request #781 from echel0n/dev

Dev
Fixed saving general settings rootDir error