relax SVN archive

Fixes for the error_analysis() function. Replicated spectra are stored in 'cdp.replicates'.

Removed some debugging print outs.

Implemented the replicated() function.

Fixes for the relax_fit.py sample script.

This includes fixes for spectrum.read_intensities() and the use of spectrum.replicated().

The duplicated spectra are now specified in the relax_fit.py system test script.

Fixes for all the peak list reading tests.

The int_method arg to spectrum.read_intensities() was incorrectly set to 'heights'.

Removed some debugging code.

Fix for the relax_fit.py system test script.

The spectrum.read_intensities() user function arg int_method was incorrectly set.

Added a check for the value of int_method in the spectrum.read_intensities() user function.

Modified the NOE calculation code for the new spectra setup.