Merge pull request juju#910 from sinzui/release-2.0-beta1

Release 2.0-beta1 is the current devel release.

Author: Peter Matulis

src/en/reference-releases.md

@@ -76,8 +76,8 @@ agent-stream: proposed
 
 ## Development
 
-2.0-alpha2 is currently in development for testing.
-The previous development release was 1.26-alpha2.
+2.0-beta1 is currently in development for testing.
+The previous development release was 2.0-alpha2.
 
 Development releases provide new features that are being stablised.
 These releases are *not* suitable for production environments. Upgrading
@@ -92,15 +92,15 @@ sudo apt-get install juju-core</pre>
 {: .instruction }
 
 Centos
-: [juju-2.0-alpha2-centos7.tar.gz](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-2.0-alpha2-centos7.tar.gz) ([md5](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-2.0-alpha2-centos7.tar.gz/+md5))
+: [juju-2.0-beta1-centos7.tar.gz](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-2.0-beta1-centos7.tar.gz) ([md5](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-2.0-beta1-centos7.tar.gz/+md5))
 {: .instruction }
 
 OS X
-: [juju-2.0-alpha2-osx.tar.gz](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-2.0-alpha2-osx.tar.gz) ([md5](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-2.0-alpha2-osx.tar.gz/+md5))
+: [juju-2.0-beta1-osx.tar.gz](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-2.0-beta1-osx.tar.gz) ([md5](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-2.0-beta1-osx.tar.gz/+md5))
 {: .instruction }
 
 Windows
-: [juju-setup-2.0-alpha2.exe](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-setup-2.0-alpha2.exe) ([md5](https://launchpad.net/juju-core/trunk/2.0-alpha2/+download/juju-setup-2.0-alpha2.exe/+md5))
+: [juju-setup-2.0-beta1.exe](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-setup-2.0-beta1.exe) ([md5](https://launchpad.net/juju-core/trunk/2.0-beta1/+download/juju-setup-2.0-beta1.exe/+md5))
 {: .instruction }
 
 Development releases use the 'devel' simple-streams. You must configure