Gwork update

Have done a fair amount of refactoring of Gwork of late. This recently went into mainline on Github.

Architecture

Have restructured the source folders. We now have:

        source/
               platform/
               gwork/
               util/
               test/
               designer/
               samples/

This reflects the dependencies in the project, with each parent folder relying on the child folders above it. There are no dependencies from child to parent! Previously things like input and rendering were a little intertwined with the controls. Ideally, once you get to the gwork level everything should be platform agnostic.

Cmake

Gwork now has a cmake build system. Premake just moves too glacially and still doesn't have proper support for mobile platforms like iOS. Cmake is a little intimidating at first, but worth it due to its capabilities and range of outputs. It has full support for Ninja, which is pretty zippy, and handy when testing.

Renaming

I finally got round to renaming GWEN to Gwork (or "Gwk" namespace in the project). It has changed pretty significantly with the direction structure refactoring and worthy of a rename. Don't want confusion between the original project and this one.