relax SVN archive

Deleted the completely unused pipe_control.spectrum.Bruker_import class.

This was added by Michael Bieri at r11637 in Oct 2011, but the code has never been used. Other,
simpler code has replaced its functionality.

Shifted the Bruker Dynamics Centre parsing code into the new lib.software.bruker_dc module.

Shifted the lib.xplor module into the lib.software package.

Import fix for the OpenDX user function definitions.

Shifted the lib.opendx package to lib.software.opendx.

Missing import fix for the lib.alignment.alignment_tensor module.

Shifted and decoupled some of the grace code into lib.software.grace.

This includes most of the write_xy_header() and write_xy_data() functions. The data store specific
part of write_xy_header() has been shifted into pipe_control.grace.axis_setup().

Created the empty lib.software package.

This will be for functions which create input, read output, or control external programs.

Shifted some of the pipe_control.diffusion_tensor functions to lib.diffusion.main.

Shifted calc_chi_tensor() and kappa() from pipe_control.align_tensor to lib.alignment.alignment_tensor.