Raw N-Triples editing option available for admins

[wickr]

Sometimes it is necessary to edit the raw N-Triples statements directly, and it'd be easier to have an Edit option through the UI instead of having to go in and do simultaneous updates to the file stored in Git as well as Blazegraph.

On a view page, for admins only, a "Edit Raw N-Triples" button should also be available next to "Edit". This will then go to a page with a large text box with all of the N-Triples statements available. Saving updates Git and Blazegraph as expected.

Review will still be required.
Possibly add some validation/checking as well for syntax.