Release RocksDB 5.0

Summary:
Update HISTORY.md and version.h
Closes https://github.com/facebook/rocksdb/pull/1536

Differential Revision: D4202987

Pulled By: IslamAbdelRahman

fbshipit-source-id: 94985e3

HISTORY.md

@@ -1,5 +1,5 @@
 # Rocksdb Change Log
-## Unreleased
+## 5.0.0 (11/17/2016)
 ### Public API Change
 * Options::max_bytes_for_level_multiplier is now a double along with all getters and setters.
 * Support dynamically change `delayed_write_rate` and `max_total_wal_size` options via SetDBOptions().

include/rocksdb/version.h

@@ -4,8 +4,8 @@
 // of patent rights can be found in the PATENTS file in the same directory.
 #pragma once
 
-#define ROCKSDB_MAJOR 4
-#define ROCKSDB_MINOR 13
+#define ROCKSDB_MAJOR 5
+#define ROCKSDB_MINOR 0
 #define ROCKSDB_PATCH 0
 
 // Do not use these. We made the mistake of declaring macros starting with