1. copy statements in buildplugin macro use the overwrite value from ${overwrite}, default is true
2. there is a target plugin that will build the plugin that has the name ${plugin}
3. run target does not depend on jar, instead displays a message mentioning that jar should have been already run, this increases the startime of the target significantly


git-svn-id: http://svn.igniterealtime.org/svn/repos/messenger/trunk@1578 b35dd754-fafc-0310-a699-88a17e54d16e