Added option to open another private window from private window.

Closes #776
Closes #772
Merge pull request #822 from srazi/master

Fixed a few shortcuts problems.

Closes #809
[Windows] Don't set PeerVerifyNone SSL socket verifyMode anymore.
Added support for building with Wayland.

See NO_X11 define in BUILDING.
[Linux] Install libs into /usr/lib/arch-linux-gnu if exists.

Installing into /usr/lib/i386-linux-gnu, /usr/lib/x86_64-linux-gnu
according to build platform if this directory exists.
If not or build architecture cannot be determined, falling back to
/usr/lib directory.
[Windows] Fixed issues about window positioning

-Fixed #821 and also position of new window
[Windows] Fixed first moment black background of new tab.