Labels for Vectors and Matrices (MAHOUT-65)

[Grant Ingersoll]

What are people doing for keeping track of their vectors and  
matrices?  MAHOUT-65 attempted to address that, but it seems to have  
gotten stuck.

For MAHOUT-126 (document clustering prep work), I ended up outputting  
Vector cell information to a separate file, which works but is  
cumbersome.  This issue, however, still needs a way to actually label  
and track what vector belongs to what document so as to make any sense  
out of them when the process is done.

Thoughts?

-Grant