Changed sync behaviour, it used to copy images over http interface

now it copies to a local cache and then it copies over storage APIs

- accept all images with or without signatures
- disable sync writing to stdout
- added more logs
- fixed switch statement in routes
- fixed enabling sync multiple times for storage subpaths

closes #266

Signed-off-by: Petu Eusebiu <peusebiu@cisco.com>

examples/sync-auth-filepath.json

@@ -1,5 +1,5 @@
 {
-    "localhost:8080": {
+    "127.0.0.1:8080": {
         "username": "user",
         "password": "pass"
     },