#461 - ENH: Add @Draftable support - phase 1

src/main/java/com/avaje/ebean/Query.java

@@ -297,6 +297,11 @@ public interface Query<T> extends Serializable {
    */
   Query<T> asOf(Timestamp asOf);
 
+  /**
+   * Execute the query against the draft set of tables.
+   */
+  Query<T> asDraft();
+
   /**
    * Cancel the query execution if supported by the underlying database and
    * driver.