probably gunna want to undo this, but i want to save it
WOOO!!!! browser && node both passing basic tests against the same code base (with some browserify aliasing)

TODO:
* real/robust mocha tests for node & browser (automate via Grunt)
* significant refactoring
* optimization for size and binary storage in browser (likely using pure levelDOWN/level-js)
* command line runnable with options
* browser tangle api