openshot-qt: 2.0.7 -> 2.1.0

Also update libopenshot (0.1.1 -> 0.1.2) and libopenshot-audio (0.1.1 ->
0.1.2). Both  libraries seem to be somewhat version coupled with
openshot (all three projects had a release at the same time).

Openshot now depends on ZMQ.

Test notes: the application runs, but I managed to crash it after doing
this:

* Import pictures and video
* Add two pictures to the timeline (next to each other)
* Drag the 2nd picture partly over over the first
  (creates an effect). App dies.

The last output from the app is:

  timeline_webview:INFO addTransition...
  Unhandled Python exception
  Aborted

The same crash happens with v2.0.7 though.