Changes

This is a major bug fix release. A number of important bugs have been fixed including the failure of model selection between global diffusion models when using the local tm models ([https://gna.org/bugs/?7616 bug #7616]), the failure of model elimination when the model 'm0' is used ([https://gna.org/bugs/?7226 bug #7226]), and the failure in the reading of old model-free results files from relax versions prior to 1.2.5 ([https://gna.org/bugs/?7587 bug #7587]). Additional bug fixes are detailed below. New features include preliminary support for RNA/DNA data and support for the [http://www.nmr-relax.com/manual/grace_write.html grace.write user function] for reduced spectral density mapping.