fixed firestackModule binding

Author: auser

Diff for: lib/firestackModule.js

@@ -50,8 +50,15 @@ export class FirestackModule {
   }
 
   makeRef(path) {
-    const refName = [this._refName, path].join('/');
-    return this._makeRef(this._firestack.database.ref(refName));
+    const refName = '/' + [this._refName, path].join('/');
+    const ref = this._firestack.database.ref(refName);
+    return this._makeRef(ref);
+  }
+
+  setFirestack(firestack) {
+    if (firestack) {
+      this._firestack = firestack;
+    }
   }
 
   setStore(store) {
@@ -156,7 +163,7 @@ export class FirestackModule {
           }
           return error ? reject(error) : resolve(value)
         });
-      });
+      })
     });
   }
 
@@ -198,7 +205,7 @@ export class FirestackModule {
   get actions() {
     return [
       'listen', 'unlisten',
-      'get', 'set', 'update', 'remove'
+      'getAt', 'setAt', 'updateAt', 'removeAt'
     ].reduce((sum, name) => {
       return {
         ...sum,