chore(*): basic build sys based on ngBoilerplate v0.3-wip
feat(*): basic curtain functionality
docs(*): improved demo look and feel
feat(*): added routing with $location.path
fix(*): incorrect CSS properties for section height
docs(demo): added about section
feat(*): renamed directives to be more logical

BREAKING CHANGE: `ctn-curtain` is now `ctn-curtains` and `ctn-section`
is now `ctn-curtain`.
docs(demo): updated demo l&f; added about & usage

The Rainbow library was added to support syntax highlighting in the
demo. It was added manually as it is not in Bower.

The main demo stylesheets were separated to ease the transition to
Bower packaging in the near future.