This is the first version of the NSOpenGLView subclass to be used by the
(yet-to-be-committed) class vrj::GlWindowCocoa?. This approach is based on
my original idea of making an instance of this class a subview of an
InputViewCocoa? instance. That ended up not working, but maybe it will work
with a future version of Cocoa. Hence, the reason for committing these files
in this form is to get a bit of extra revision control behind them.
