add 2.0.27 info

BASHO_RELEASES

@@ -1,11 +1,16 @@
+github.com tag 2.0.27 - August 22, 2016
+---------------------------------------
+mv-mem-fences:  fix iterator double delete bug in eleveldb and
+                build better memory fenced operations for referenced count objects.
+
 github.com tag 2.0.25 - August 10, 2016
 ---------------------------------------
  - make LZ4 the default compression instead of Snappy.
  - update compression flag in eleveldb.schema to support
    choosing Snappy or LZ4
  - add expiry settings to eleveldb.schema
  - disable cuttlefish as dependency riak.conf
- 
+
 github.com tag 2.0.22 - June 21, 2016
 -------------------------------------
  - branch mv-iter-valid (PR 199): adjust recent code accessing iterator->Valid() where
@@ -20,4 +25,3 @@ github.com tag 2.0.21 - June 17, 2016
 github.com tag 2.0.10
 -------------------------------------
  - version shipped with 2.1.3
-