relax SVN archive

Large improvements to the prompt help strings for the user function classes.

These are now formatted with section using bold text.

The user function default args prompt help string text is now wrapped.

Removed the starting newline from the user function prompt help string.

Converted the calc, grid_search and minimise user function descriptions to use Desc_container.

Tables in the user function descriptions are now formatted for the prompt help strings.

This is for the Desc_container objects. The list of lists are now converted to the text format
originally used for the user function docstrings such as:

__________________________________________________________________________
| | |
| Minimisation algorithm | Patterns |
|________________________|_______________________________________________|
| | |
| Simplex | '^[Ss]implex$' |
| | |
| Levenberg-Marquardt | '^[Ll][Mm]$' or '^[Ll]evenburg-[Mm]arquardt$' |
|________________________|_______________________________________________|

Converted all of the alignment tensor user functions to the new Desc_container design.

Itemised lists and verbatim text are now formatted properly for the prompt help strings.

Converted align_tensor.init to the Desc_container object design to test itemised lists.

The Desc_container object now supports itemised lists.

Lists are now formatted for the prompt uf help strings from the Desc_container objects.