allow signing signed data + only do sign transform if new data from self else verify

sea/https.js

@@ -1,10 +1,10 @@
 
     var SEA = require('./root');
-    if(SEA.window){
+    try{ if(SEA.window){
       if(location.protocol.indexOf('s') < 0
       && location.host.indexOf('localhost') < 0
       && location.protocol.indexOf('file:') < 0){
         location.protocol = 'https:'; // WebCrypto does NOT work without HTTPS!
       }
-    }
+    } }catch(e){}