CasperJS v1.1.0 npm module.
Reworked CLI with validation and control flow.
index.js code is missing.
Fix the `--capture` and `--build` flags behaviours.
Explicit requirement of `casperjs` executable.
Explicit requirement of `casperjs`'s own `phantomjs` executable path.
Merge pull request #2 from oncletom/cli-flow

Better CasperJS integration