Use watchify via beefy instead of wzrd for faster bundle generation in dev
Use watchify via beefy instead of wzrd for faster bundle generation in dev

With browserify regenerating the bundle each time, took about 13 seconds
between page reloads. watchify generates incrementally, much faster:

200 11409ms    10.03MB  /bundle.js ➞ ./node_modules/watchify ./index.coffee -d --debug
200   30ms    10.03MB  /bundle.js ➞ ./node_modules/watchify ./index.coffee -d --debug

z3t0/voxelmetaverse,z3t0/voxelmetaverse,deathcap/voxelmetaverse,deathcap/voxelmetaverse,nacjm/modcraft,nacjm/modcraft,deathcap/voxelmetaverse,z3t0/voxelmetaverse