Start weston server in background

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2491 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
westonrdpcaller: don't overwrite the key

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2492 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
westonrdpcaller: enable xwayland, and change dialog to tell user the server is running

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2493 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9