relax SVN archive

The new auto-generated user function classes now fit into the prompt help system.

Documented the prompt-based help system _Helper.__call__() method.

The auto-generated user class object now accepts the desc arg and stores it for use in the help system.

Added a __repr__ method to the user function class objects for presenting a better message to users.

Added the prompt.objects module which contains the user function auto-generation objects.

The interpreter now auto-generates the user function classes.

Modified the Class_container class to be more like the Uf_container class.

Added two iterator methods for looping over the user functions and classes.

These are class_loop() and uf_loop().

The user function container args variable is now private and modifiable.

It needs to be modifiable so the __init__ method can initialise it.

Clean up of the pipe module (removal of useless imports and syntax fixes).