relax SVN archive

Fixed some circular import issues.

The R2 and NOE data is now translated as well.

Bug fix for the translate function. The old list was being overwritten.

Values of 'None' are now translated to the '?' string.

Improvements for the relaxation data storage tag categories.

Different NMR-STAR dictionary definitions are supported and the tag names are now located in the
tag name dictionary.

Added v3.1 support for the T2.

Full implementation of v3.1 NMR-STAR support.

T2's are still missing, causing an import error.

Redesign for different NMR-STAR dictionary version support.

All class variables have been converted into dictionaries created upon instantiation.

Some class name changes.

Started to implement different NMR-STAR version support.

There are obvious design issues here, preventing this from working!