relax SVN archive

Modified the pymol.cone_pdb() user function to handle x, y, and z-axes.

Modified create_cone_pdb() to accept a pre-made structural object and to create a file only when asked.

Switched the names of the Pseudo_elliptic and Pseudo_elliptic2 classes.

Bug fix for the frame_order.pivot() user function - it is now functional.

The base contents of the relax data store are no longer saved with a call to results.write().

More fixes for the torsionless isotropic cone frame order model.

Bug fix for the unpacking of results from the torsionless isotropic cone frame order model.

The optimised cone angle was being set to the order parameter in cone_s1.

Fix for the pcs.back_calc() user function for when multiple structures are loaded.

Fix for rdc.read() when neg_g_corr is set to True and the RDC list contains entries with None.

The negative gyromagnetic ratio correction flag neg_g_corr is now available in the rdc.read() user fn.