relax SVN archive

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.

The relax main instance is no longer passed into the prompt/script interface.

This can be done as the prompt/script interface has been detached from relax.

The relax main instance is no longer passed into the test suite.

This can be done as the prompt/script interface has been detached from relax.

Created the populate_self() method to place all user functions into the interpreter namespace.