LibRingClient has moved to extragear/network

[Elv1313 .]

Hi,

After going through kdereview for the last few weeks, libringclient
(formerly the sflphone-kde client logic library) is now moving to KDE
extragear. I am currently starting to remove the legacy Qt4 support
still required by the KDE4 client (and porting it to kf5) so the
translation issue should be solved in the coming week. For now, the
translations are still based on kde4 l10n way of handling pure Qt
libraries.

Thanks to everybody who took a look at the project while it was in kdereview!