relax SVN archive

The auto-generated prompt user function front end objects are now executable.

The uf.backend variable is now the executable Python object. The pipe user function class has been
updated for the uf.backend change.

Implemented the missing back end of the pipe.current user function!

Expanded and fixed the argument checking for the prompt auto-generated user function front ends.

The auto-generated prompt user function front ends now convert arguments to keyword arguments.

This is important as a keyword arg can be supplied without the keyword in Python!

Removed the last reference to the eliminated Exec_info prompt object.

Clean up of the prompt intro strings for the auto-generated user functions.

The prompt intro strings are now created for the auto-generated user functions.

Missing import of the status object.

Absorbed the Exec_info prompt object into the relax status singleton and eliminated it.

The prompt strings are now prompt.base_class module variables, and the current ones are stored in
the status object. The user function intro flag is now stored in status.prompt_intro. The
prompt_colour_on() and prompt_colour_off() methods are now methods of the interpreter class. Now
that the Exec_info class no longer exists, the Basic_class class has also no purpose and has been
eliminated.

The prompt help system now uses bold text for the title line and all subtitles.

The subtitle underlines are now not used, but the ability to underline is retained.