vertical tabs for paragraphs
added new paragraph tab to paragraph tab list
fix ajax for creating a new paragraph
fixed ajax for deleting paragraphs
hide paragraph tabs when scene is not open
created a open? method for scenes
made sure paragraph tabs appear and disappear when scene addition and deletion
fixed edit mode to use tabs
edit mode tabs styling
Merge branch 'master' into para_tabs

Conflicts:
	app/views/scenes/_scene_info.html.erb
tabs follow order of ordered_paragraphs method