relax SVN archive

This release fixes a number of bugs affecting the creation of Dasha scripts for specific model-free
models (two time scale motions but without the tf parameter), and the reading back in of Dasha
results for models with motions on two time scales. The function 'value.write()' which was broken
when trying to write out relaxation data (R1, R2, or the NOE) has been fixed as well.