Update 26 May 2014
There is now an official breezejs bower package for client assets. Install from a terminal/command window with
bower install breezejs
Case matters! Be sure to spell "breezejs" in all lowercase.
This package contains the core JavaScript distribution files PLUS
adapters - the officially supported breeze adapters in the core, including the mongo client adapter
labs - the currently "approved" breeze.labs
HTH
p.s.: You still use nmp to install the breeze-mongodb module on your node server.
Original
Feel your pain. It's helpful to our priority setting to know that this matters to you.
We are in the midst of doing two things about this.
refactoring the github repository into multiple repos to be more sensitive to technology preferences.
working with the current keepers of the Breeze bower repos to refactor accordingly; actually, they have offered to let us take over ... and we will; we just need a little more time.
Until then, I'm afraid you'll have to grab the JavaScript files from github yourself. Fortunately there are not many of them.
Breeze client JavaScript files are in the build folder of the breeze.js repo.
Breeze Labs for JS clients are in the breeze.js.labs repo.
The breeze-mongodb module for your node server you can install with npm.