Move the sources for nodes into own CVS directory
to compile independently on the rest of the
openide and depend just on openide-util.jar and
let them be deployed into own openide-nodes.jar
Suitable place for nodes could be openide/nodes
Depends on separation of util and blocks separation of explorer.
Taking over the node bugs from phrebejk.
Already done by Yarda some time ago (modulo the CVS move, but
compilation is separate already).