image thumbnails now scale appropriately so there is no whitespace, also generalized some thumbnail loading code

config/config.json

@@ -49,8 +49,8 @@
         "S3Region": ""
     },
     "ImageSettings": {
-        "ThumbnailWidth": 200,
-        "ThumbnailHeight": 0,
+        "ThumbnailWidth": 120,
+        "ThumbnailHeight": 100,
         "PreviewWidth": 1024,
         "PreviewHeight": 0,
         "ProfileWidth": 128,