disable unused features in panopticon artefact form

Resolves theodi/publisher#56
Merge branch 'refs/heads/master' into feature-remove-extra-fields

Conflicts:
	app/views/artefacts/_form.html.erb
hide description field
Don't hide things in test mode (so they can still be tested)
Merge branch 'feature-remove-extra-fields' of github.com:theodi/panopticon

Conflicts:
	app/views/artefacts/_form.html.erb
Merge pull request #34 from theodi/feature-remove-extra-fields

Hide unnecessary fields in panopticon