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

Lots of work on command line options and env vars. * All command line options use the -f, --foo, --no-foo style. * We are not using ipython_dir (code), --ipython-dir (command line) and IPYTHON_DIR (env).

Fixing small bug in activate. If the parallelmagic extension has not been loaded, activate would get an empty list from get_component. Now get_component returns None in that case and activate checks for None and prints a message to the user to load the extension.

Adding new magics to install config files and profiles. * %install_profiles will install the default profiles in .ipython. * %install_default_config will install the default config file (ipython_config.py) into .ipython.

Make the default colors OS dependent.

Minors fixes on Windows. * Don't import daemonize if os.name=='posix'. * Allow the controller to overwrite old .pid files upon startup. This was needed because the Windows HPC job scheduler kills jobs in a way that the signal handlers are not being run.

Made ipcontroller/ipengine/ipcluster command locations configurable. I try to find these locations automatically, but on some systems users need to be able to specify them.

Merging upstream changes.

Fixing a few small things on Windows. * No os.environ['USER']. * get_home_dir() now first looks at %HOMESHARE% to get a UNC shared path if it exists. * Minor fixes for setupbase.py.

More work on the kernel.