closes #1 initial checkin
updates based on @mikewalch comments
Closes #3 Adding ability to calculate cardinalities for the same word appearing multiple times in the same document.
Merge pull request #1 from cjnolet/fq-3

Closes #3 Adding ability to calculate cardinalities for the same word ap...
#1 more code review updates
Merge pull request #2 from keith-turner/fq-1

closes #1 initial checkin