example: commonjs/node based approach

Implements request #41 

[Diff without whitespace changes](https://github.com/flightjs/jasmine-flight/pull/44/files?w=1)

This depends on the commonjs-wip branch of Flight. Note the rather hacky feel of karma's commonjs plugin (requires listing of each commonjs file it needs to preprocess).
`require('flightjs')` -> `flight`