relax SVN archive

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.

Created the lib.text.table module.

This originates from the prompt.uf_docstring module as most of that module is functions for creating
formatted text tables.

Created a unit test for the lib.geometry.lines.closest_point() function.

Added a unit test for the lib.geometry package __all__ list.

Blacklisted a number of files in the maths_fns package for the package __all__ list unit test.

Improved the base class unit test for the package __all__ list.

Subpackages are now also checked.

Added the package checking unit tests for the lib package.

Created the lib.geometry.lines module for performing geometric operations with lines.

This has one stub of a function lib.geometry.lines.closest_point() which will be used to find the
closest point on a line to a given point.