Move graphics code from Adapter to OpenGL, moved GL code out of input
Moved app to core.main
Merge pull request #217 from Circular-Studios/feature/RefactorAdapter

Refactor: Adapter
Ignore that pesky selections file
Fixed shadows
Merge branch 'develop' of github.com:Circular-Studios/Dash into SDLAdapter

Conflicts:
	source/dash/graphics/adapters/package.d
	source/dash/graphics/graphics.d
Improved SDL support to the point that it appears to be on par with
windows. Fixes #207