relax SVN archive

Brought the relax_data.copy() user function arg unit tests into line with the other copy() functions.

Fix for indecies in the test_copy_protein_sequence() unit test.

Missing deepcopy import.

Modified exists_mol_res_spin_data() to accept the data pipe arg.

Wrote the sequence.copy() user function.

Wrote the generic_fns.sequence.copy() function.

Wrote 3 arg unit tests for the sequence.copy() user function.

Wrote a unit test for testing the copying of an amino acid sequence.

Wrote the test_omp_analysis() system test for testing a simple model-free analysis on the OMP data.

Bug fix for the Unit_test_runner.

The get_module_relative_path() function was sometimes failing because of the format of the
package_path argument. This should be a string but, when run from an outside directory, often this
path would already be split up into the segment path list. The fix just catches this so that the
function doesn't try to segment the segmented list.