Update standalone flight.js build products

* Generate both a minified and unminified standalone version.

* De-minify the AMD-shim (as part of providing an unminified version of flight.js for dev).

* Add a version / license banner at the start of the standalone Flight files. Fixes #96

* Create `release/latest` and `release/{{version}}` directories in the gh-pages branch to persist specific versions of Flight. Latest release will always be found in the 'latest' directory. Will end up with something like this:

```
release/
    1.0.9
        flight.js
        flight.min.js
    1.0.10
        flight.js
        flight.min.js
    latest
        flight.js
        flight.min.js
```