added preliminary support for psd images - layers appear not to work

Former-commit-id: 49e0416d1872185b7255b39af8c35fcae21d062d

config/tmarrinan-cfg.json

 {
-	"host": "131.193.76.128",
+	"host": "marrinan.evl.uic.edu",
 	"port": 9090,
 	"index_port": 9292,
 	"clock": 12,

node_modules/node-itemloader.js

@@ -35,6 +35,7 @@ function appLoader(publicDir, hostOrigin, displayWidth, displayHeight, titleBarH
 		"image/jpeg": "image_viewer", 
         "image/png": "image_viewer",
         "image/tiff": "image_viewer",
+        "image/vnd.adobe.photoshop": "image_viewer",
         "video/mp4": "movie_player",
         "video/youtube": "movie_player",
         "application/pdf": "pdf_viewer", 
@@ -239,7 +240,7 @@ appLoader.prototype.loadImageFromFile = function(file, mime_type, url, external_
 			gm(buffer).size(function (err, size) {
 				if(err) throw err;
 				
-				_this.loadImageFromDataBuffer(buffer, size.width, size.height, mime_type, url, external_url, name, function(appInstance) {
+				_this.loadImageFromDataBuffer(buffer, size.width, size.height, "image/png", url, external_url, name, function(appInstance) {
 					callback(appInstance);
 				});
 			});