relax SVN archive

Created the framework for the unit tests of the lib.text package.

Added the spacing argument to lib.text.table.format_table().

This removes the reference to the user function table spacing variable from this function and shifts
it to the prompt.uf_docstring.create_table() function.

Fix for lib.text.table.format_table() as table_line() is now private.

Deleted prompt.uf_docstring.table_line() as this is now a private function of lib.text.table.

Removed a number of unused imports in prompt.uf_docstring.

The prompt.uf_docstring module now uses lib.text.table.format_table().

This significantly simplifies the module.

Refactored the lib.text.table module.

The create_table() function is now called format_table() and the table_line() function has been made
private. All references to the user function tables and the relax status object have been removed
and replaced by arguments to format_table().

Improved the package __all__ list base unit test by skipping all hidden files and directories.

Implemented the closest_point() and closest_point_ax() functions of lib.geometry.lines.

These two functions do the same thing - find the closest point on a line to any given point - but
take different arguments to define the line.

Updated the lib package __all__ list for the lib.text package.