relax SVN archive

Spun off half of the read() function into the new generate() function.

The new function will be very useful for other parts of relax.

Improved the wildcard_match() function to allow comparisons of the strings both ways.

The Selection.contains_*() methods now call the wildcard_match() function for comparisons.

Wrote 6 unit tests for the Selection.contains_*() methods when regular expression is passed in.

Wrote 7 unit tests for the Selection.contains_spin() method.

Fixes for the test_atom_loop_spin_selection1() unit test.

Fixed a unit test for the Scientific_data.atom_loop() method with the '@163' spin selection.

2 unit test functions had the same name, so only one was being run.

The PipeContainer.__repr__() unit test are now stricter, checking for returned strings.

Added a tearDown() clean up method for the unit tests of the PipeContainer.

Fix for the PipeContainer.__repr__() method.

The is_empty() function is skipped.