Add users to /:id route

So now when you type site/:username it redirects you to users page.
And if you type site/:groupname it redirects you to group page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Show small notice at profile page about publicity

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'namespace-route' into 'master'

Namespace route

Fixes #1312
Merge branch 'public-profile-info' into 'master'

Public profile info

Show small info about your profile being publicly because you joined public project![Screenshot 2014-06-07 15.17.17](https://dev.gitlab.org/uploads/dzaporozhets/gitlabhq/eecf9a0bdc/Screenshot_2014-06-07_15.17.17.png)

Fixes #1321