relax SVN archive

The relax_io.open_read_file() now supports all Python versions over 2.4.

This required some really nasty hacks for Python 3.0, 3.1 and 3.2 with the Bzip2Fixed and GzipFixed
classes overriding the incomplete and buggy bz2.BZ2File and gzip.GzipFile modules, and being wrapped
around io.TextIOWrapper().

Added the IO module to the relax information print out and dependency checks.

The manual C module compilation script is now executable.

Renamed the 'scripts' directory to 'devel_scripts' so that users are less likely to ask about the scripts.

Finished off the C module compilation testing script.

Added a script for testing out the C module compilation on multiple python targets.

The relax_fit specific analysis module now supports both Python 2 and 3.

The command used was:
2to3 -w specific_fns/relax_fit.py

The relaxation curve-fitting C module now supports compilation on both Python 2 and 3.

First attempt at making the relaxation curve-fitting C module Python 3 compatible.

Python 3 bug fix for the internal PDB and XYZ 3D structure readers by using relax_io.readlines().