Note the PDB ID on error.
Work on issue #81: Made CathDomain implement StructureIdentifier.
Finished SubstructureIdentifier and made Identifier.loadIdentifier
static (as it should have been).
Merge branch 'master' of https://github.com/biojava/biojava
Small improvements and bug fixes for issue #81.
Added guessOrderFromAngle to RotationAxis.
Moved CeSymm and some related classes to biojava-structure.
Didn't mean to push previous commit to main.

This reverts commit da1522e6e230efe999a613c1d42faff36bae24ea.