Functsional term lookup, that likely performs poorly since it only uses basic Lucene. No accounting for word order, text coverage, etc...

Updates to use 2 different indexes, one for words in a concept name, one mapping concept name to a CUI

Initial commit, fails with java.nio.file.NoSuchFileException: /Users/ozborn/code/repo/umlsIndex/target/index.lucene/write.lock