relax SVN archive

Added a test for the Scientific PDB parser availability when initialising the structural object.

Removed another Numeric dependence.

Made some tests pass on 32 bit Windows.

Corrected the F_eta and F_R2 values within the system test.

The old values were those for the 1.2 line where the CSA was -170 ppm (now -172).

The consistency_tests system test now completely passes.

Corrected looping over residues in the consistency_tests system test.

These changes make the system test pass and are based on the jw_mapping system test.

Removed the readline dependence, this is now optional.

Added checks for the Scientific.Visualization.VMD import (because it requires Numeric).

Added a check for the minfx python package.

Changed the Numeric dependency check to a numpy check.

For the new relax design, 'residue' was renamed to 'spin' and 'protein' renamed to 'molecule'.