Add relation between user and posts (existed between posts and user) : has_many "posts"
Can now display posts related to an author
use name and firstname in url for SEO
bugfix on author's class
add link on author's name
merge dev into branch used for feature on author's link
Merge remote-tracking branch 'github/dev' into master/0.2
Merge pull request #7 from vrcAlbert/master/0.2

Feature on author : can display related posts