relax SVN archive

Molecular dynamics by NMR data analysis

Brought to you by: edauvergne, troelslinnet

The frame order linear_constraints() function now returns None if no constraints are present.

This allows the code using this to be simplified with respect to turning off the constraints.

Authored by: bugman 2014-07-11

changed	/branches/frame_order_cleanup/specific_analyses/frame_order/api.py
changed	/branches/frame_order_cleanup/specific_analyses/frame_order/optimisation.py
changed	/branches/frame_order_cleanup/specific_analyses/frame_order/parameters.py