refactored BTDownload Payment Options renderer into a universal PaymentOptionsRenderer. Now available on Library. Added License column on transfers and library files.
Updated Torrents.fm search performer.
clearbits search engine removed, service offline. 5.7.1 build 4.
Split 'common/' into commit '7864dc1a19379030cd532c3ab17f020548287854'

git-subtree-dir: common
git-subtree-mainline: 02b94a564feddc7783c15b5db810c9e69c240d0d
git-subtree-split: 7864dc1a19379030cd532c3ab17f020548287854