added error logging

services/web/app/coffee/Features/Chat/ChatController.coffee

@@ -1,14 +1,21 @@
 ChatHandler = require("./ChatHandler")
 EditorRealTimeController = require("../Editor/EditorRealTimeController")
+logger = require("logger-sharelatex")
 
 module.exports =
 
 
 	sendMessage: (project_id, user_id, messageContent, callback)->
 		ChatHandler.sendMessage project_id, user_id, messageContent, (err, builtMessge)->
+			if err?
+				logger.err err:err, project_id:project_id, user_id:user_id, messageContent:messageContent, "problem sending message to chat api"
+				return callback(err)
 			EditorRealTimeController.emitToRoom project_id,  "new-chat-message", builtMessge, (err)->
 				callback(err)
 
 	getMessages: (project_id, query, callback)->
 		ChatHandler.getMessages project_id, query, (err)->
+			if err?
+				logger.err err:err, query:query, "problem getting messages from chat api"
+				return callback(err)
 			callback()