relax SVN archive

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.

Renamed the class in the old prompt.noe module.

Renamed the noe module to spectrum.

The noe module only contains user functions will are to be merged into the spectrum user function
class, hence will be deleted anyway.

Deleted the prompt.spectrum module.

The prompt.noe module will be renamed to this as its only functions are the same as the spectrum
user function class.

Created the empty user function class 'spectrum'.