relax SVN archive

Editing of the relax command line option descriptions.

Removed the automatic axis labelling in the lib.software.grace.write_xy_header() function.

This is the automatic labelling based on the parameter Grace strings and units of the specific
analysis type. This is now preformed by the specific analyses themselves so the automatic code is
not needed or used.

This allows the dependence on the pipe_control.pipes module and the specific analysis API to be
removed making the relax library now 100% independent from the rest of relax.

Shifted many of the pipe_control.structure.geometric functions into the relax library.

All but two functions from the pipe_control.structure.geometric module are independent of the relax
data store. These have been shifted into the new lib.structure.geometric module. This removes most
of the remaining relax dependencies in the relax library.

Shifted the data_store.relax_xml module into the relax library as lib.xml.

This module contains a couple of functions which are used for converting Python objects into an XML
representation and back again. These are used not only by the relax data store, but also a number
of the structural objects in the relax library (which are themselves placed in the relax data
store). This makes the relax library more independent from the rest of relax.

Huge clean up of all unused imports in relax.

These were found using the find_unused_imports.py development script. A number of these changes
significantly decrease the possibilities of circular imports appearing in the future. And this also
makes the relax library more independent from the rest of relax.

Added the missing Bioinformatics to the bibtex file journal name aliases.

Removed the dependence on the relax 'dep_check' module from the lib.frame_order package.

This is for more independence of the relax library.

Clean up of many unused imports in the test suite directories.

The unused imports were found using the find_unused_imports.py development script.

Shifted the read_spin_data() and write_spin_data() functions from lib.io to lib.sequence.

Removed a number of unused imports from the user function definitions.

These unused user_function package imports were found using the find_unused_imports.py development
script.