Add split view - #4
Merge branch 'master' into split-view

Conflicts:
	src/views/editor-view.js
	static/assets/js/codebrowser-min.js
	static/assets/js/codebrowser-templates-min.js
	static/assets/js/codebrowser.js
Merge branch 'master' into split-view
Fix merge conflict
Simplify logic
Finalise logic behing splitting editor
Change inputs to buttons
Add split button for editor to snapshot navigation