relax SVN archive

Wrote the arg unit test module for the eliminate() user function, with 2 unit tests.

Converted the eliminate() function to the new relax design.

Converted all 0 and 1 binary vals to the bools False and True.

Added a module docstring.

Converted the Eliminate.eliminate() method to a module function.

Bug fix for the spin_loop.

If the spin_loop was being executed an arbitrary data pipe (rather than the current), the call to
exists_mol_res_spin_data() was operating not on that pipe but on the current pipe!

Fixed the spin loop call in the copy() function.

Modified the generate() function to accept any data pipe.

Fix for the copy() function, only the sequence is copied and not the contents of the SpinContainer.

Modified the test_copy_protein_sequence() unit test to check that only sequence data is copied.