relax SVN archive

Import fixes for the newly renamed generic_fns.structure.internal() module.

Module rename.

Started the conversion of the internal relax structural object to be independent of the PDB format.

Corrected a small error in a 'for' loop that prevented relax from working.

Started to convert sel_spin() to the new design.

Updated sel_read() to the new design.

Wrote 2 unit tests for the boolean args of the select user functions.

Updates for RelaxNoPipeError and RelaxNoSequenceError.

The tests were added to reverse() and the RelaxErrors added to the epydoc text.

Updated the sel_all() function to the new design.

Updates to the reverse() function.