Add tool for retrieving freebase types for wikilinks

Adds edu.knowitall.app.util.FBTypeLookup

Requires support files at either /scratch/browser-freebase or /scratch2/browser-freebase

You can copy these files to your local machine with the command:

scp -r rv-n12:/scratch2/browser-freebase /scratch/

The code initializes lazily and will print errors to stderr if the support files cannot be found.