Prepare 2.0 alpha build

Author: Michael Babker

plugins/installer/webinstaller/webinstaller.xml

@@ -7,7 +7,7 @@
 	<license>http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL</license>
 	<authorEmail>[email protected]</authorEmail>
 	<authorUrl>www.joomla.org</authorUrl>
-	<version>2.0.0-dev</version>
+	<version>2.0.0-alpha</version>
 	<description>PLG_INSTALLER_WEBINSTALLER_XML_DESCRIPTION</description>
 	<files>
 		<folder>tmpl</folder>