relax SVN archive

Manually updated the relax_fit.py sample script to match the equivalent system test script.

Another fix for the relax_fit.py system test script.

The state.save() user function has no 'file' arg.

Fix for the relax_fit.py system test script. The 'ave_int' value type is no more!

The proper spin specific peak intensity errors are now input into the relax-fit minimise() method.

Fixed the setting of the spin specific peak intensity errors in __errors_repl().

This should be an array equal to cdp.sigma_I.

Some whitespace cleanups.

Replaced all references to 'average peak intensity'. These are no longer averaged.

Some fixes for the back_calc() relax-fit method.

Not sure if this method will work yet!

Removal of the mean_and_error() method. This is now part of generic_fns.spectrum.

Print out refinement of the __errors_repl() function.