relax SVN archive

Converted all numbers to strings for the Selection.wildcard_match() method.

Renamed Selection.match() to Selection.wildcard_match()

The molecule and residue name checking now use the new Selection.match() method.

Created the Selection.match() method to add regular expression capabilities to spin id strings.

Wrote a unit test for testing generic_fns.selection.parse_token() function on the string 'N*'.

Wrote a unit test for testing the generic_fns.selection.tokenise() function on the string '@N*'.

Updated the docstring of test_spin_loop_wildcard().

Created a unit test for the proper operation of the spin loop with spin selection '@NH|@N5'.

Created a unit test for testing the proper operation of the spin loop with wildcard spin selection.

Made the chi-squared test exact.