Make includes relative, change namespace, support unity build

Subtrees/hyperleveldb/table/two_level_iterator.cc

@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
 
-#include "table/two_level_iterator.h"
+#include "two_level_iterator.h"
 
-#include "hyperleveldb/table.h"
-#include "table/block.h"
-#include "table/format.h"
-#include "table/iterator_wrapper.h"
+#include "../hyperleveldb/table.h"
+#include "block.h"
+#include "format.h"
+#include "iterator_wrapper.h"
 
-namespace leveldb {
+namespace hyperleveldb {
 
 namespace {
 
@@ -179,4 +179,4 @@ Iterator* NewTwoLevelIterator(
   return new TwoLevelIterator(index_iter, block_function, arg, options);
 }
 
-}  // namespace leveldb
+}  // namespace hyperleveldb