Add a comment about bootstrap navbar overlaping.
[dependency] Fix express framework version to 3.x
[refactor] Move librairies from 'public/js' to 'public/lib'.
[grunt] Add grunt and jshint default task
Update README.md to explain use of grunt tasks to build the app.
[grunt] add jsbeautifier task
[refactor] use jsbeautifier to clean-up *.js syntax files
[dependency] remove unused 'ejs' dependency.