Update CHANGELOG.md

Author: jpatel531

CHANGELOG.md

@@ -1,3 +1,7 @@
+0.2.0 / 2015-03-30
+==================
+
+* A HTTP client is shared between requests to allow configuration. If none is set by the user, the library supplies a default. Allows for pipelining or to change the transport.
 
 0.1.0 / 2015-03-26
 ==================
@@ -7,4 +11,4 @@
 * Authentication of private and presence channels
 * Pusher webhook validation
 * Querying application state
-* Cluster configuration, HTTPS support, timeout configuration.
+* Cluster configuration, HTTPS support, timeout configuration.