relax SVN archive

Import error fix.

Import fix for generic_fns.spectrum.

Renamed the generic_fns.intensity module to generic_fns/spectrum.

Rewrote the spectrum.error_analysis() user function docstring.

This is still missing 3 sections for error analysis with the volume integration methods.

spectrum.error_analysis() now calls generic_fns.intensity.error_analysis().

Renamed spectrum.mean_and_error() to spectrum.error_analysis().

Shifted the relax_fit.mean_and_error() user function interface to spectrum.mean_and_error().

Added new arguments and improved the spectrum.read_intensities() docstring.

The mol_name_col, res_num_col, res_name_col, spin_num_col, spin_name_col, and sep args have been
added to support the generic intensity file format. This format has also had a description in the
docstring written.

Switched from calls to noe_obj to generic_fns.intensity.

Fixed docstrings and user function print outs.