Added the possibility to make it work with transmission in a different subfolder
The transmission url detection now :
  - is executed only if the url is not already ending with rpc
  - detects ports up to 6 digits long (changed from 4)
Add description to the getArtist API response
Tabs to spaces. Whoops!
Merge remote-tracking branch 'Qt-dev/master' into develop
Took off a little of the transmission_host description text
Added AdeHub's changes from here: https://github.com/rembo10/headphones/pull/1330
Merge remote-tracking branch 'djeebus/add_description_to_artist_api' into develop