relax SVN archive

Removed a number of sys.exit() calls from different relax modes.

The return call is used rather than sys.exit() to exit the main run() method. These were not needed
and it allows the 'version', 'info', and 'gui' modes to play better with the multi-processor package
when using mpi4py.

Shifted the mpi4py processor module functions broadcast_command() and ditch_all_results() into the class.

These have been turned into private methods.

Redesigned how the multi-processor package terminates program execution.

The Processor.exit() method has been introduced to perform this action. By default (used by the
uni-processor fabric), the method does nothing. The mpi4py_processor.py module functions exit() and
exit_mpi() have been merged into the Mpi4py_processor.exit() method.

Spelling fix for a number of the processor method names.

Fully documented the Processor.run() method via comments.

Eliminated the unused Set_processor_property_command class.

Eliminated the unused Get_name_command class.

Clean up of the Exit_command.

This no longer has an __init__() method, and has proper descriptions via docstrings and comments.

Shifted the Multi_processor.run() method up a level to Processor.run().

This completes one of the TODOs, and will be needed to avoid code duplication for handling the new
data_upload() and data_fetch() API methods. This run() method now works for the uni-processor, as
the Uni_processor.on_master() method which always returns True has been reactived, so the
Uni_processor.run() method has been deleted.

Eliminated the completely unused create_slaves() Processor method.