[doc] changelog added

CHANGELOG.rst

@@ -0,0 +1,26 @@
+0.6.0
+=====
+
+-  Changelog added
+-  New engines
+   -  Flickr (api)
+   -  Subtitleseeker
+   -  photon
+   -  500px
+   -  Searchcode
+   -  Searchcode doc
+   -  Kickass torrent
+-  Precise search request timeout handling
+-  Better favicon support
+-  Stricter config parsing
+-  Translation updates
+-  Multiple ui fixes
+-  Flickr (noapi) engine fix
+-  Pep8 fixes
+
+
+News
+~~~~
+
+Health status of searx instances and engines: http://stats.searx.oe5tpo.com
+(source: https://github.com/pointhi/searx_stats)