only png jpg and gifs are allowed for image upload, increase profile image size to 256kb

src/routes/user.js

@@ -91,9 +91,18 @@ var user = require('./../user.js'),
 			if(!req.user)
 				return res.redirect('/403');
 			
-			if(req.files.userPhoto.size > 131072) {
+			if(req.files.userPhoto.size > 262144) {
 				res.send({
-					error: 'Images must be smaller than 128kb!'
+					error: 'Images must be smaller than 256kb!'
+				});
+				return;
+			}
+			var allowedTypes = ['image/png', 'image/jpeg', 'image/jpg', 'image/gif'];
+			var type = req.files.userPhoto.type;
+			
+			if(allowedTypes.indexOf(type) === -1) {
+				res.send({
+					error: 'Allowed image types are png, jpg and gif!'
 				});
 				return;	
 			}