added grunt tasks to compile the sass stylesheet
moved sass grunt package to dev dependencies
added nodemon task in grunt
express middleware to inject user info if token is passed and is valid
users.requiresToken middleware
signals auth integration
Merge pull request #13 from vns/dev

upgrade to express 4
Merge pull request #14 from vns/dev

fixed bugs after upgrade to express 4
Merge pull request #12 from npetevn/css2sass

added grunt tasks to compile the sass stylesheet
converted tabs to spaces [grunt fix-spaces]