relax SVN archive

Added a new arg unit test for the relax_data.copy() user function, checking when both pipes are None.

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.