Doh. Fixed minor typo in last commit.

Doing ipcluster stop on windows will now simply remove the .pid file.

The cluster applications now have a working directory option.. The ipcontroller, ipengine and ipcluster application now have a working directory that is os.chdir'd to in the pre_construct stage. There is a corresponding --working-dir command line flag and Global.working_dir config attribute.

Fixing a few bugs in the unicode path changes.

Beginning to transition all paths, files, dirs over to unicode. In preparation for getting ready for Python 3, all filename, paths and dirs should be representated as unicode strings internally. I have begun to make this transition in the main applications (ipython/ipcontroller/ipengine/ipcluster).

Initial version of Win HPC job scehduler support.

Added components to manage jobs/tasks for Win HPC job scheduler.

Fixing two bugs in the handling of paths and profiles. * If a user is using a profile, but doesn't have the subconfig installed we just pass silently. Before, we raised an IOError. * My new expand_path function had a stupid bug in it.

Fixing subtle bug in expanduser(expandvars(path)) on Windows. On Windows, some paths can have the string $\ in them: \\server\users$\%username%. The "$" means it is a hidden share. Unfortunately, os.path.expandvars turns that into: \\server\users\%username% (it deletes the '$'). I have implemented a simple function (expand_path) that calls os.expanduser and os.expandvars in a way that preserves th '$' on Windows in this case.

General work on the controller/engine/cluster startup. * All cluster processes now chdir to the cluster_dir before starting. * More consistent exit codes for ipcluster. * If FURL files are reused, we exit if the user has not set a non-zero port. * Clean up of different subcommands in ipclusterapp.py