rename tempdir to createDir to make code more lisible
wip: launcher.php documentation/refactoring
wip: launcher.php cleanup
wip: more documentation/cleanup

todo: only use password to log in

id_rsa key should be enough to connect to the cluster/send a job
only use password if launcher is called from command line
remoteDirExists and remoteFileExists utility functions implemented
implemented getGroupId() static function in UserC
implemented UserC::setupDir()
Merge branch 'master' of https://github.com/FNNDSC/chrisreloaded into not_shared_fs
Updated submodule
Implemented passwordless ssh
bug fixed
bug fixed
remaining file ssh.tar.gz is now removed from the cluster afte setupDir
moved utility functions remoteFileExists and remoteDirExists to _util.inc.php
triming of group ID within getGroupId()
implemented setupClusterDir and setupServerDir and removed getGroupId
added ->login(, ); after the last  = new Net_SSH2(CLUSTER_HOST);
now returns  before waiting for ssh.tar.gz being removed from the cluster
added CLUSTER_CHRIS_USERS env variable
first implementation of feed data transfer between cluster and server