Can load abitrary shaders, RGBAMode
Merge branch 'master' into wip
Merge branch 'master' into wip

Conflicts:
	TODO.md
	src/Flowskell/Viewer.hs
Merge branch 'master' into wip

Conflicts:
	src/Flowskell/Viewer.hs
Do a screenshot (F7), store source filepath in state and not in environment
Color command can now be used to set alpha transparency
Rename example
Fix syntax error
Fix shader example
Update TODO