We now have a cmake-format config file.
We no longer use list variables for sources, instead using
target_sources when we need to add, in accordance with current
best practice. (This makes it a lot easier to edit too.) There's no more
include_directories(), add_definitions(), or other gently-deprecated
directory-scoped commands, nor any CMake scripts that include
a parent directory reference (named targets instead)
The Qwerty driver will emulate an HMD and controllers through the use
of mouse and keyboard, and in particular, using the SDL key events
generated from the debug GUI.
