fixed up svn_externals to use batchmode=no instead of passwordauthentication=no
added get_engine_hosts in subroutines to call civm_utils version once its been installed
updated subrountines get engine hosts to get only valid hosts by also importing ssh_call::works
added SSH_Works function. used in GetEnigneHosts. Will be useful in others as well.
moved some our globals to use var globals to make them acessible to subs
added debug=integer option