relax SVN archive

Converted the calc, grid_search and minimise user functions to the auto-generation design.

The minimise user function required a lot of work, as the minimise(*args, *kargs) construct is
incompatible with the auto-generation design. As this is hardly used in the field, everything has
been converted to specific keyword arguments. This will have a side benefit of being easier to
understand for a user. The back end was modified accordingly.

The 'additional' sections are now shown before the 'examples' section in the prompt help system.

The user functions without a base class are now supported in the prompt, script, and GUI modes.

This is for the auto-generated user functions not stored in a user function class object.

Fix for the Uf_info.add_uf() method - the re.search() call was matching '.' to all characters!

The 'num_or_num_list' and 'num_or_num_tuple' argument types are now supported in the GUI.

These are for the auto-generated GUI user functions. The 'num_or_num_tuple' argument type is used
for the diffusion_tensor.init user function, for example.

Fix for the gui.misc.gui_to_tuple() function.

This was failing in many cases, especially where the value is not a tuple to start with.

Improvements for the diffusion_tensor.init user function data setup.

Whitespace fix.

Converted the diffusion_tensor user functions to the auto-generation design.

The icons and wizard graphics for these user functions has also been created.

Created icons and wizard graphics for the palmer user functions.