refacto index.js & format.js & add node tests

[Swiip]

This is my undergoing refactoring of the node source files. My first idea of splitting files by options was not really doable, so I chose something less strict.

I started writing full node unit testing.

It's not finished:

• Finish writing tests
• Update method comments.

[coveralls]

Coverage increased (+0.54%) to 94.43% when pulling 1406377 on refacto-format into d28665b on master.

[zckrs]

👍

[Swiip]

Sorry for the blackout, I wanted to focus on this :)

[Swiip]

Done, and with comments!

[zckrs]

Awesome PR. 👏 👏 👏
Very nice work.

100% coverage 💃

Each contributor should read and complete the suite test before open a PR. https://github.com/Swiip/generator-gulp-angular/tree/refacto-format/test/node

[Swiip]

Thanks ;)