Revert "Lower case UUIDs - skins/avatars"

I already commited this ;)

This reverts commit e4bdecfbb756f38a85310a205a5693b7c5055f1b.

routes/avatars.js

@@ -33,8 +33,8 @@ router.get("/:uuid.:ext?", function(req, res) {
     return;
   }
 
-  // strip dashes, to lower case
-  uuid = uuid.replace(/-/g, "").toLowerCase();
+  // strip dashes
+  uuid = uuid.replace(/-/g, "");
 
   try {
     helpers.get_avatar(uuid, helm, size, function(err, status, image, hash) {

routes/skins.js

@@ -18,8 +18,8 @@ router.get("/:uuid.:ext?", function(req, res) {
     return;
   }
 
-  // strip dashes, to lower case
-  uuid = uuid.replace(/-/g, "").toLowerCase();
+  // strip dashes
+  uuid = uuid.replace(/-/g, "");
 
   try {
     helpers.get_skin(uuid, function(err, hash, image) {