upgrades underscore to 1.4.4 for findWhere
Loadout slot assignment when clicking character

pain points:
- not sure if updating a model directly is the "angular" way to do this,
but it was pretty easy
- I can foresee problems managing serialize/deserialize when inflating
loadout units from the base64 encoded path in the url, not sure how to
deal with internal angular model attributes like $$hashKey

positives:
- I really like how simple the domain code is coming, @kbaribeau would
probably like this code a lot better than the backbone codes (i think).

:)