new materials edit part-way
some more materials repeater stuff
update errors a bit
de-default asset model
hide message region's bottom margin when empty
assets have special upload method for formData
new materials repeater in place
Merge remote-tracking branch 'remotes/origin/mike' into excerpts

Conflicts:
	app/assets/javascripts/form/volumeEditMaterialsForm.js
	app/assets/javascripts/view/volumeView.js