Downloads
The best way of installing this plugin is by using the following location as an update site. Point Eclipse (Help / Software Updates / Find and Install ... New Remote Site) to (don't copy the quotes. "Copy Link Location" in your browser should work):
Although the source is included with the plugin if you want to import the plugin project into a Eclipse using Eclipse's import (File / Import / General / Existing Projects into Workspace) use this archive. If you want to install the plugin manually you can find the jar file here.