Angular footer simplify version

In order to build a angular directive, I have tested whether I can
build a footer version without using `generator-angular`. For this
`footer-minimal` version:
- Create a folder to implement a minimal version without installing all
sort of angular modules and packages.
- The `styles` folder contains the `.css` files
- The `script` folder contains the angular scripts
- Using angular controller to build the first dynamic minimized version.