relax SVN archive

final separation between the multi framework and relax and initial
documentation of multi.processor

Fix for bug #8996 (https://gna.org/bugs/?8996).

This bug was reported by Carl Diehl.

The issue was that the data structure 'data.heteronuc' did not exist and is now called
'pdb_heteronuc'. This issue had been fixed in the 1.3 line but was incomplete in the 1.2 line (the
printing of values was ok but the errors and simulations were incorrect).

Fix for bug #9093.

threaded multi processor support written, multi is now beta!
multi now supports three substrates: mpi4py, uniprocessor, and threads

major restructuring to create generic multiprocessor framework legacy
string based exception handling supported

correct use of -n command line option, work to give general processor
base class and simple processor implimentations

Addition of processor based intro string, correction of error in
Application_callback exceptio_handler named error_handler

modifications to make the multi hierachy indepndant of relax; multi can
now be used to run other multiprocessor tasks (uni processor and mpi
work)

improved output and exception handling

correction to master slave output prefixes