Tokenizers - improve algorithm around exact matches.
Test Plan: looked at a project tokenizer and typed "project". since I have a million things with the word "project" in it, I was delighted to see the "project" project first in this project tokenizer.
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T6102
Differential Revision: https://secure.phabricator.com/D11305