message: change main entrypoint
diff: "name": "blockstack",
  "version": "0.3.10",
  "description": "The Blockstack Javascript library for identity and authentication.",
  - "main": "lib/index",
  + "main": "dist/blockstack.js",
  "scripts": {
  "browserify": "./node_modules/.bin/browserify lib/index.js --standalone blockstack -o ./dist/blockstack.js",
  "browserify-tests": "./node_modules/.bin/browserify lib/index.js --standalone blockstack -o ./tests/browserTests/bundle.js",
  