relax SVN archive

This is the first release of the new 1.2 branch. Relaxation curve fitting is now supported within
relax. Many of the development related scripts for compiling the manual, removing temporary files,
creating the distribution packages, etc have been moved into makefiles. Installation is now through
makefiles as well and the command 'make install' as root will install relax. C modules have been
added which interface with relax through the Python/C API. These implement the functions using in
the optimisation of relaxation curves. To create the C shared objects, the command 'make' is used.