Captcha9kw: new selfsolve option
+ removed unused imports

(cherry picked from commit 116dde5cd71e12f9a5dab5275e4802ee95dc1368)
New hoster: RgHostNet
Requested in #176

(cherry picked from commit 2a7f6327bb9b6463ef316d2c0d64ba841ae6f0f5)
Keep2share: improved offline pattern

suggested in #92
(cherry picked from commit ba9af516dad81b97c2558e68cce189cdc910e4fb)
SimpleHoster: workaround load cookies 0.4.9 bug
See also ecb3e1cf7733d6f217082abcbe41c0e07dc522da

(cherry picked from commit da499334b36eb1b9de871ac7ee926f4a1cae82a6)
FilecloudIo: premium support

(cherry picked from commit 37251667fed7fcbb77ea55df7ca98f2d5bef1b19)
New crypter: FiletramCom

(cherry picked from commit cbae329a2098fabb5099ef94a8d0bee5d7937de5)
New hoster: GooIm
requested in #158

(cherry picked from commit af8eeeb2a896a450085679bf68a9d5febe400a0c)