message: manually install blockstack.js
diff: #!/bin/sh
  BLOCKSTACK_BRANCH="rc-0.14.2"
  -
  -test -d /home/ubuntu/blockstack.js || exit 1
  +BLOCKSTACK_JS_BRANCH="v0.6-core-auth"
  # get bitcoind
  sudo add-apt-repository -y ppa:bitcoin/bitcoin || exit 1
  @@ -35,12 +34,12 @@ cd /tmp/blockstack-core/integration_tests && ./setup.py build && ./setup.py inst
  npm install -g babel
  npm install -g browserify
  -ls -al /usr/share/node_modules/
  -ls -al /usr/share/node_modules/blockstack
  -
  -sudo mkdir -p /usr/share/node_modules
  -test -d /usr/share/node_modules/blockstack && rm -rf /usr/share/node_modules/blockstack
  -sudo cp -a /home/ubuntu/blockstack.js /usr/share/node_modules/blockstack
  +# get blockstack.js
  +git clone https://github.com/blockstack/blockstack.js /tmp/blockstack.js
  +cd /tmp/blockstack.js && git checkout "$BLOCKSTACK_JS_BRANCH" && npm install
  +sudo mkdir -p /usr/lib/node_modules
  +sudo rm -rf /usr/lib/node_modules/blockstack
  +sudo cp -a /tmp/blockstack.js /usr/lib/node_modules/blockstack
  # run the relevant integration tests
  blockstack-test-scenario blockstack_integration_tests.scenarios.name_preorder_register_portal_auth || exit 1
  