[Client] 2.1.2 released

This is a maintenance release for 2.1 series of the client.  This resolves issues where the timeline was off for several hours, fixes a (serious) crash where the Windows client crashes when playing in-progress events and fixes several memory leaks.  This should also help clients stay connected to servers with IP cameras that perform strangely.

For a complete list, see below.

As always you can download the client on our website, www.bluecherrydvr.com/downloads or run ‘sudo apt-get update ; sudo apt-get install bluecherry-client’ on Ubuntu / Debian systems.  Optionally you can build the latest client yourself by downloading the source code here (https://github.com/bluecherrydvr/bluecherry-client)

The following features are added in this release:

* Feature #29: Hide disabled devices from the main UI list
* Feature #32: Add Bluecherry icon to 12.04 desktop
* Feature #38: Sort servers alphabetically
* Feature #83: Port client from qmake to CMake

The following bugs are fixed in this release:

* Bug #28: Timeline area off by several hours
* Bug #41: Integer overflow on event durations
* Bug #78: Live feeds still exist after deleting a server
* Bug #94: Only prompt for new updates when version < then installed version
* Bug #99: Playing in progress events crashes Windows client
* Bug #122: Server column should not be collapsed
* Bug #123: Memory leak on reconnect
* Bug #129: Do not allow to install bluecherry with gstreamer-vaapi
* Bug #135: On MacMini no live view is available when OpenGL is enabled