Changes Goals.md to Requirement.md, sorted into priorities
remove Goals.md
CSS/Javascript pre-processor commands finished

- Javascript files in public/js/src are concatenated and then minified to mafia.min.js (with license prepended)
- In development mode, all scripts from public/js/src are included
- mafia.less is compiled to mafia.css (may change to Sass in future)
- In development mode, mafia.less is included alongside less.js

Other changes:

- minor version tick (0.0.x -> 0.1.x)
- `install recommended` will install recommended modules (in addition to required ones)
- added some links to layouts/default.html.ep footer, and added a CC-By notice