[transaction] now transaction builder provides execute so we dont hav…

…e to call build.

dbflow/src/main/java/com/raizlabs/android/dbflow/structure/database/transaction/Transaction.java

@@ -238,5 +238,12 @@ public Builder runCallbacksOnSameThread(boolean runCallbacksOnSameThread) {
         public Transaction build() {
             return new Transaction(this);
         }
+
+        /**
+         * Convenience method to simply execute a transaction.
+         */
+        public void execute() {
+            build().execute();
+        }
     }
 }