Updated readme and changelog for beta4

CHANGELOG.rst

@@ -1,3 +1,20 @@
+1.0.0-beta4
+===========
+Sep 11, 2014
+
+Features
+--------
+* Added node discovery and now handle topology/status change events
+* Queries that modify schema wait for cluster schema agreement
+* Added DC aware load balancing policy. The default policy is set to
+  round robin.
+* Added new methods to configure the load balancing policy, 
+  `cass_cluster_set_load_balance_round_robin()` and
+  `cass_cluster_set_load_balance_dc_aware()`
+* It is now possible for a session future to return an error when
+  connecting to a cluster. This can occur when the driver is unable to connect
+  to any contact points or the provided authentication credentials are invalid.
+
 1.0.0-beta3
 ===========
 Aug 13, 2014

README.md

@@ -34,6 +34,8 @@ the Cassandra Query Language version 3 (CQL3) and Cassandra's Binary Protocol (v
 ## Building
 The driver is known to work on OS X 10.9, Windows 7, RHEL 5.10, and Ubuntu 14.04. The driver itself currently has two dependencies: [libuv 0.10](https://github.com/joyent/libuv) and [OpenSSL](http://www.openssl.org/). To build the driver you will need [CMake](http://www.cmake.org). To test the driver you will also need to install [boost 1.41+](http://www.boost.org),  [libssh2](http://www.libssh2.org) and [ccm](https://github.com/pcmanus/ccm).
 
+Note: The driver doesn't work with libuv 0.11
+
 It has been built using GCC 4.1.2+, Clang 3.4+, and MSVC 2010/2013.
 
 ### OS X