[BREAKING] js: api: /new: Only send POST body

In accordance with the previous commit, send all data as
POST instead of mixing and matching with query params.

isso/js/app/api.js

@@ -92,7 +92,8 @@ var qs = function(params) {
 
 var create = function(tid, data) {
     var deferred = Q.defer();
-    curl("POST", endpoint + "/new?" + qs({uri: tid || location()}), JSON.stringify(data),
+    data.uri = tid || location();
+    curl("POST", endpoint + "/new", JSON.stringify(data),
         function (rv) {
             if (rv.status === 201 || rv.status === 202) {
                 deferred.resolve(JSON.parse(rv.body));