Datafixes

@caesarfeta this includes a minor fix to the BodinExternal.js to work with external annotations that don't have subreferences (the subreference in the prior version of alignment.xml was just a test case - the only one we have actually doesn't have subreferences and when I pulled in the real data that exposed the bug).

I also created a new data directory which contains the cleaned up and culled annotations from the students and Yannis, including the commentary annotations I created from his doc.  I've named them according to annotation type and what the primary target is per file.

I think we should also put the Latin, French and English XML in there - we should use Yannis' version of the English and French XML. I checked and the students didn't make any changes to the Latin so we can use any of their versions they should all be the same.