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

Conflicts:
	example/declarative/line_primitive/line_primitive.html
	lib/src/spectre_declarative/camera.html
	lib/src/spectre_declarative/line_primitive.html
	lib/src/spectre_declarative/material.html
	lib/src/spectre_declarative/material_constant.html
	lib/src/spectre_declarative/model.html
	lib/src/spectre_declarative/scene.html
	lib/src/spectre_declarative/spectre.html
	lib/src/spectre_declarative/texture.html
	lib/src/spectre_declarative/transform.html
Add missing import
Large cleanup

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