add multi-platform support to Vagrantfile
add multi-platform support to Vagrantfile

hlmnrmr/liveblog,superdesk/liveblog,liveblog/liveblog,hlmnrmr/liveblog,liveblog/liveblog,hlmnrmr/liveblog,superdesk/liveblog,hlmnrmr/liveblog,liveblog/liveblog,liveblog/liveblog,superdesk/liveblog,superdesk/liveblog,liveblog/liveblog