relax SVN archive

Code rearrangment in the test_Selection_boolean_and() unit test.

Wrote a unit test for the Selection object for boolean '&' mol-res-spin selections.

Wrote a unit test for the Selection object for complex boolean mol-res-spin selections.

A few minor changes to the Selection object.

The element type is added to the SpinContainer in the load_spins() function.

The identifier is now bracketed by '^' and '$' in wildcard_match().

The Scientific Python data object now uses the wildcard_match() method to handle regular expression.

Converted the Selection.wildcard_match() method into a module function.

Renamed 'string' to 'id' in the Selection.wildcard_match() method.

'*' shouldn't be replaced by '+', it should be replaced by '.*'!