relax SVN archive

The correlation time values, gradients, and Hessians of the rotational Brownian diffusion have been
modified using the equations

Diso = 1/3 (Dx + Dy + Dz),
Da = Dz - 1/2(Dx + Dy),
Dr = Dy - Dx / 2Da.

All references to isotropic, axially symmetric, and anisotropic diffusion have been changed to
sphere, spheroid, and ellipsoid respectively.