* Calling enable_testing() only in root path.
* Using CORRADE_CXX_FLAGS instead of our own set to make things easier
to maintain.
* Various cleanup and reorganization.
Similar to `glxinfo`, displays information about Magnum engine and
OpenGL capabilities. Currently for Unix/X11 only, as I don't have
windowless application implementation for other platforms.
Finally something that can be used for:
* Unit tests
* Resource compilation
* Benchmarks
* ...
I also desperately need something similar for Windows (and Mac OS, too).
Because with NaCl WindowContext doesn't make sense anymore, the classes
are now renamed:
* Contexts namespace -> Platform
* *WindowContext -> Application
Hopefully this is (one of) last crazy renaming runs.