Added history for 1.5.2 and bumped version.

History.rdoc

@@ -1,5 +1,21 @@
 == Development (master)
 
+== 1.5.2 2016-04-17
+
+=== New Features/Changes
+  * Use default_client with mongoid 5.0 (@stjhimy)
+  * Added comparable support for strategies (@st0012)
+  * Better README instructions that suggest `append_after` (@jrochkind)
+  * Removed deprecation warnings for Rails 5.0+ (@pschambacher)
+  * Upgrade to RSpec 2.14 (@skalee)
+
+=== Bug Fixes
+  * @dmitrypol fixed issue #409
+  * @schmierkov fixed the Travis builds with PR #416
+  * @shosti fixed issue #345
+  * @kylev fixed issue #379
+  * @skalee fixed the Travis builds for Neo4j with PR #433
+
 == 1.5.1 2015-09-05
 
 == Bug Fix

VERSION.yml

@@ -1,4 +1,4 @@
 ---
 :major: 1
 :minor: 5
-:patch: 1
+:patch: 2