Forgotten changes
Merge branch 'master' of https://github.com/johnmccutchan/spectre

Conflicts:
	test/src/material_test.dart
	test/src/renderer_test.dart
Initial Example work
Refactoring

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Misc. fixes.

Signed-off-by: John McCutchan <john@johnmccutchan.com>
Merge remote-tracking branch 'origin/master'

Conflicts:
	lib/src/spectre/graphics_context.dart