relax SVN archive

The dAuvergne_protocol class now calls the user functions from the self.interpreter instance directly.

Alphabetical ordering of methods.

Update the user function print out functions.

_off() and _on() are no longer private, and accept the verbose keyword arg to allow the print out to
be suppressed.

Comment fix.

Removed redundant and now non-functional code from interact_script().

Fixed the script user function.

Fixed all the calls to the user functions located in the interpreter class.

self.relax is no longer referenced and the user functions are now directly called.

The interpreter _on() method does not need to be called as user fn intros are turned on by default.

Created the SystemTestCase base class for all the system tests to use.

This base class initialises the relax interpreter within the TestCase class instances.

The relax main instance is no longer handled by the system test initialisation code.