relax SVN archive

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.

Deletion of the format argument from the spectrum.read_intensities() user function.

To compensate for this, relax will be modified to auto-detect the file format.

Renamed spectrum.read() to spectrum.read_intensities().

Docstring updates for spectrum.read().

Renamed 'spectrum_type' to the more generic 'spectrum_id'.

Deleted the old NOE user function class from the interpreter namespace.