URI encode the URL message from JS to ObjC.

Not sure how this ever worked by only doing a JSON.stringify is not good enough to pass a URI from JS to ObjC. Stray "/" characters were getting introduced that caused corruption and failed calls.

Fixes issue with Fold account info not getting properly saved off.

lib/js/airbitz-bridge-ios.js

@@ -39,7 +39,11 @@ function _native(functionName, cbid, args, block) {
   if (args) {
     data.args = args;
   }
-  return openUrl(b, "bridge://airbitz.co/" + JSON.stringify(data), cbid);
+
+  var jsonStr = JSON.stringify(data)
+  var uriString = encodeURIComponent(jsonStr)
+
+  return openUrl(b, "bridge://airbitz.co/" + uriString, cbid);
 }
 
 function openUrl(block, url, cbid) {
@@ -159,7 +163,10 @@ function _bridge() {
     },
 
     writeData: function(key, value) {
-      _handleBlocking(_native('writeData', newId(), {'key': key, 'value': value}, true));
+      var nid = newId()
+      var nret = _native('writeData', nid, {'key': key, 'value': value}, true)
+      _handleBlocking(nret);
+      // _handleBlocking(_native('writeData', newId(), {'key': key, 'value': value}, true));
     },
 
     clearData: function() {