Merge pull request #342 from eile/master

Fix universal AGL build
Merge pull request #343 from eile/master

Install CMake script to provide the correct set of OpenGL libs to Eq-based applications
Use exclusive event registration, fix resizing
Merge pull request #344 from tribal-tec/master

Use exclusive event registration, fix resizing
Merge pull request #345 from eile/master

Improve handling and robustness for GL on OS X
Use async streaming of dcstream library
Merge pull request #346 from tribal-tec/master

Use async streaming of dcstream library
Implement Qt window system for onscreen windows (#21)
CR #335
CR #347:

* Cleaner way to figure out if window system need main thread event
  dispatch
* Cleaner destruction of qt::GLWidget using bound method
* Cleanups