Underscore 1.4.4 was making tests run much slower than 1.4.2 ever did.

Until we figure out some solution to this (or switch to lo-dash), I'm going to
remove 1.4.4 so I can get work done on top of devel.

Revert "upgrade package underscore too"

This reverts commit 7022916fb4a6f895e93c74b5b831bc4f1ba2c231.
Remove underscore version bump from History.md

Debatably, we should also downgrade the dev bundle?  Unsure about this.