relax SVN archive

Recreation of the relax_disp branch from the latest trunk code.

This branch will be a recreation of the old relax_disp branch which is no longer visible in the head
revision. Each commit of the old branch will be manually ported with commands such as:

svn merge -r8242:8243 svn+ssh://bugman@.../svn/relax/branches/relax_disp .

The old branch will remain permanently in the repository, but will not be visible at head revision.

Deletion of the relax_disp branch.

This branch will be recreated as a copy of the latest trunk, and the useful commits from the old
relax_disp branch manually ported with commands such as:

svn merge -r8242:8243 svn+ssh://bugman@.../svn/relax/branches/relax_disp .

The old code will remain permanently in the repository, but will not be visible at head revision.

Initialized merge tracking via "svnmerge" with revisions "1-16824" from
svn+ssh://bugman@.../svn/relax/branches/relax_disp@r16824

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().