Added simple static site build script (under MIT license)

Expects Tornado templates in the following directories:
  deploy
  templates
      branches
      leafs

Leafs will be put through the appropriate filters (css, html, etc) and put into
the deploy directory. If the template is in templates/leafs/img/someimg.png it
will be copied to templates/deploy/img/someimg.png. The branches folder are not
copied over, they are simply templates which are used by other pages. This is
important because the build.py script automatically put everything in leafs
into the deploy directory when they are "compiled."