relax SVN archive

All the targets of all makefiles have been rewritten into python functions within the Sconstruct
file 'sconstruct'. Now instead of typing 'make install', you type 'scons install'. Hence, all
makefiles have been deleted.

The executable python script 'docs/latex/fetch_docstrings' has been moved to the non-executable file
'docs/latex/fetch_docstrings.py'. It is now imported into the Scons python script 'sconstruct' and
hence '__init__.py' files have been added to the 'docs' and 'docs/latex' directories.

The script 'docs/latex/version' has been shifted completely into the 'sconstruct' file and has been
deleted.

The file 'docs/release_checklist' has been modified to use the scons rather than make commands.

The script 'package' which was made redundant by the original shift to the make system has been
deleted.

Bug fix: The file 'generic_fns/palmer.py' has been modified to gracefully handle a Modelfree4 bug
whereby the 'mfout' output file has been corrupted due to the fusion of columns.