Move async utils into indexing

Author: akleeman

include/albatross/Indexing

@@ -13,13 +13,14 @@
 #ifndef ALBATROSS_INDEXING_H
 #define ALBATROSS_INDEXING_H
 
+#include <future>
 #include "Dataset"
 
 #include <albatross/src/indexing/traits.hpp>
 #include <albatross/src/indexing/subset.hpp>
 #include <albatross/src/indexing/filter.hpp>
 #include <albatross/src/indexing/apply.hpp>
-#include "./utils/AsyncUtils"
+#include <albatross/src/indexing/async_apply.hpp>
 #include <albatross/src/indexing/group_by.hpp>
 
 #endif