relax SVN archive

Fixes for the arg unit tests of the spectrum.baseplane_rmsd() user function.

Fix for 2 arg unit tests of the spectrum.integration_points() user function.

Fix for the N arg check of the spectrum.integration_points() user function.

Wrote 3 arg unit tests for the spectrum.integration_points() user function.

Created the spectrum.integration_points() user function interface.

Renamed spectrum.error() to spectrum.baseplane_rmsd().

Modified the int_col arg to spectrum.read_intensities() to allow for lists of integers.

Wrote 15 arg unit tests for the spectrum user functions.

Created the new error class RelaxNoneIntListIntError.

Created the skeleton module for arg unit tests of the spectrum user function class.