Prerelease 2015-03-16

New prerelease! Config/shortcuts/commandline have been internally refactored, and I've added a switch --opengl to select which OpenGL implementation to use on Windows:
--opengl desktop uses your graphics card's native GL library (which can often be buggy)
--opengl angle uses ANGLE to translate OpenGL ES calls into DirectX, which will generally (sadly) work better on Windows,
--opengl software uses a software rasterizer
--opengl auto (the default if you don't select anything) gets Qt to autodetect the which of the above works the best, in the order listed here.

I originally tried to allow you to specify this in the config file, but this isn't currently possible; the GL mode must be specified very early in the app's initialization (i.e. before the config gets parsed and loaded). If you don't want to specify this command-line option all the time, set the QT_OPENGL environment variable to "desktop", "angle", or "software".