relax SVN archive

Fixes for the user function docstrings for the changes to the macro modules.

The Molmol and PyMOL classes are now initialised by the model-free class and the methods aliased.

Added the macro_base module to the __all__ package list.

All the model-free macro methods are no longer private.

The class will not be used as a base class for the model-free specific class.

Added module docstrings for all the model-free macro modules.

Removed unused imports.

Abstracted the model-free 'classic' Molmol and PyMOL creation in to a base class.

As most of the code between the specific_fns.model_free.molmol and specific_fns.model_free.pymol
modules is identical, this significantly simplifies the code base.

Completely converted the PyMOL model-free macro creation from Molmol to PyMOL commands.

This now reproduces the Molmol 'classic' representation.

The PyMOL macro header has now been converted from Molmol to PyMOL commands.

The menu icons for the pymol.macro_run and molmol.macro_run user functions is now the open icon.