* Quite a lot of bugfixes and improvements in documentation, thanks to
feedback from users.

* New notable features include TUN devices, shared and master/slave
mounts and alternative signal stack (sigaltstack) support.

* Memory tracking is now upstream.

* This is the last release, that is tied to kernel release. The next
one will happen as soon as we decide it's worth doing so, not after
the linux-3.12.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>