Return incidents that match keywords as substrings

[noah-schechter]

Current
The search Munition does not return Munition/Chemical.

Proposed
It should. I know this may interfere with our boolean logic (-word, word1 AND word2, etc.) but I think we can incorporate both. Specifically, when searching for a non-quoted term, we should search within words, not just for exact matches. If this impacts performance perhaps we can make it an optional mode (I know we have users who would like this feature)