Initial version of working refactored ipcluster....
Initial version of working refactored ipcluster.
This new version uses Twisted's cross platform process management
API and provides:
* New command line parsing using argparse. This allows for different
subcommands (ipcluster local, ipcluster pbs, ipcluster mpirun, etc).
* Currently working local and mpirun stating of clusters.
* Almost working pbs starting.
This has no docs and no tests as of yet and should be considered a tech
preview.
