relax SVN archive

Spell check and formatting fixes to the relax development chapter of the manual.

Removal of the style file.

Added a chapter to the manual for coding and the development of relax.

The current contents of the chapter is the text from the file 'docs/style'.

Moved all the temporary manual files out of version control.

Compilation of the manual is now by 'make'.

To create the PDF version of the manual, type 'make manual' in the base directory, while to create
the HTML version, type 'make manual_html'. The two scripts 'docs/latex/compile' and
'docs/latex/create_html' have been shifted into the new makefile 'docs/latex/Makefile'.

Shifted the installation instructions from the text file docs/INSTALL to a chapter of the manual.

Changed a few of the to do items.

Relaxation curve fitting and Makefile changes.

A second Makefile within the 'maths_fns' directory has been created as a copy of the Makefile in the
base directory. The new Makefile contains the compilation rules for the maths_fns directory which
were located in the old file.

The files 'exp_fn.c' and 'exp_fn.h' have been renamed to 'relax_fit.c' and 'relax_fit.h'
respectively. This is so the old function names can contain the code for back calculating the
peak intensities from the given parameters, while the relax_fit code contains the setup function as
well as the functions func, dfunc, and d2func.

More minimisation code has been added to 'specific_fns/relax_fit.py'.

Rolling back all changes to the 1.0 branch back to revision 2294.

The changes which are being removed now exist in the 1.1 branch.

Creating an unstable development fork from 1.0 called 1.1.

This fork exists because the last few commits of the relaxation curve fitting modifications have
involved changes which significantly alter parts of the program and could cause the program not to
work in certain situations. Therefore the stable branch 1.0 has been forked and the unstable 1.1
branch has been created for developing the relaxation curve fitting code.

One of the major changes includes the addition of C code for the implementation of functions
involved in the optimisation of the parameters of the exponential curves. This code is compiled
into shared objects '*.so' which are loaded at run-time as modules into the Python code. The
interface between C and Python is the low level Python/C API.

To build these C modules, relax has shifted to using Makefiles. Therefore to compile the code, the
command 'make' will create the shared objects. Instead of relying on a script, 'make clean' will
remove all the '*.pyc', '*.o', and '*.so' files. The Makefile will be extended to include
procedures which include the creation of the relax manual, creation of the HTML version of the
manual, and the compilation and packaging of relax for distribution.

C code has been introduced solely to decrease computation time. This inclusion also allows the use
of fast Fortran linear algebra libraries using C to Fortran interfaces. Despite using C code, relax
will be developed so that the compilation of this code is not essential for running the program. If
the shared objects do not exist, relax will disable these components of the program.

The 1.0 branch will be reverted back to revision r2294 which was the last commit not involving
relaxation curve fitting. This stable branch is now reserved for bug fixes only, features will be
added to the 1.1 branch.