Fix spelling of plural project (projects and not project's).
Use rails image-url herlper

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

Fix spelling of plural project (projects and not project's).

Just a minor spelling error.
 Merge branch 'asset-path-in-scss' into 'master'

 Use rails scss image-url herlper
Merge branch 'master' of github.com:gitlabhq/gitlabhq
Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce