improve recommendation system
Merge branch 'master' of github.com:francorisso/hackathon2014_720devs
Add users system
Merge branch 'master' of github.com:francorisso/hackathon2014_720devs
integrate into design, add boards, add topics per user
Merge branch 'master' of github.com:francorisso/hackathon2014_720devs