Initial commit, updates readme

Signed-off-by: Braden O'Guinn <braden@astonishdesign.com>
Adds step to install phantom through npm

Signed-off-by: Braden O'Guinn <braden@astonishdesign.com>
Adds phantomjs to astonish wercker box

  - Adds scripts to download, unzip, and symlink phantomjs in provision.yml
  - Adds package tag to wercker.yml
  - Adds readme section for testing provision.yml

Signed-off-by: Braden O'Guinn <braden@astonishdesign.com>