Now everything that uses Profiles from cache will also use it's
mutex to lock access. This brings more stability improvements :).
Also fixed profile update in database.
Qt5 interface is now translated (kinda).
Fixed Pooler's data race which occurs on every server's pinging
goroutine creation, because of uncontrolled write to current
requests counter. Protected it with mutex.
Added very experimental and not-yet-working qt5 interface. Maybe
it will be completed someday.
