Add ability to request the doc as plain text, rather than a json object.

This makes it much easier to stream-parse the document.

services/web/app/coffee/Features/Documents/DocumentController.coffee

@@ -6,15 +6,20 @@ module.exports =
 	getDocument: (req, res, next = (error) ->) ->
 		project_id = req.params.Project_id
 		doc_id = req.params.doc_id
+		plain = req?.query?.plain == 'true'
 		logger.log doc_id:doc_id, project_id:project_id, "receiving get document request from api (docupdater)"
 		ProjectEntityHandler.getDoc project_id, doc_id, (error, lines, rev) ->
 			if error?
 				logger.err err:error, doc_id:doc_id, project_id:project_id, "error finding element for getDocument"
 				return next(error)
-			res.type "json"
-			res.send JSON.stringify {
-				lines: lines
-			}
+			if plain
+				res.type "text/plain"
+				res.send lines.join('\n')
+			else
+				res.type "json"
+				res.send JSON.stringify {
+					lines: lines
+				}
 
 	setDocument: (req, res, next = (error) ->) ->
 		project_id = req.params.Project_id