relax SVN archive

Created icons and wizard graphics for the calc and minimise user functions.

Fix for the Angles.test_angles system test.

The user function angle_diff_tensor now has a user function class and is called angles.diff_tensor.

Fixes for the standardisation of the max_iter keyword arg in the minimise user function.

Created icons for the grid_search user function.

Eliminated the wiz_combo_default and combo_default args from the GUI auto-generated user functions.

These are now provided by the 'default' arg.

Fix for the dauvergne_protocol auto-analysis required by the recent changes to the minimise user function.

Eliminated the 'wiz_combo_default' user function arg arg.

This argument is duplicative of the 'default' argument.

The default value of the user function args is now set in the wizard page elements.

This is for the auto-generated user functions.

Fix for the auto-generated minimise user function - the max_iter argument was a mess!

Fix for the auto-generated palmer.create user function - the spin ID arg can be None.