relax SVN archive

Updated the Structure.test_atomic_fluctuations_gnuplot system test.

This is for the changes of the gnuplot correlation_matrix() plotting API function used by the
structure.atomic_fluctuations user function.

Forced the gnuplot correlation_matrix plot to be square.

This is for the correlation_matrix() plotting API function used by the new
structure.atomic_fluctuations user function.

Fixes and improvements for the gnuplot correlation_matrix() plotting API function.

This is for the structure.atomic_fluctuations user function. The "pm3d map" plot type is incorrect
for such data type, so instead of using 'splot', 'plot' is being used instead. The resultant EPS
file is now much smaller. The colour map has also been changed to one of the inbuilt ones for
higher contrast.

Docstring fixes for the Structure.test_atomic_fluctuations_gnuplot system test.

This was pointing to the structure.rmsd user function instead of structure.atomic_fluctuations.

Updated the Structure.test_atomic_fluctuations_gnuplot system test.

This is for the gnuplot correlation_matrix() plotting API changes which affect the
structure.atomic_fluctuations user function.

Improvement in the comments from the gnuplot correlation_matrix() plotting API function.

Significantly expanded the gnuplot script from via the correlation_matrix() plotting API function.

This is for the structure.atomic_fluctuations user function. The output terminal is now set to EPS,
the colour map changed from the default to a blue-red map, labels have been added, the plot is now
square, and comments are now included throughout the script to help a user hand modify it after
creation.

The gnuplot correlation_matrix() plotting API function now creates a text file of the data.

The lib.plotting.gnuplot.correlation_matrix() function now calls the
lib.plotting.text.correlation_matrix() function prior to creating the gnuplot script.

Fix for the structure.atomic_fluctuations user function backend.

The pipe_control.structure.main.atomic_fluctuations() function no longer opens the output file.

More simplifications for the structure.atomic_fluctuations user function backend.