Update rails to 3.2.16

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Bump version to 6.3.1
Merge branch '6-3-1-stable' of /home/git/repositories/gitlab/gitlabhq into 6-3-stable
Merge pull request #140 from gitlabhq/6-3-stable

6 3 stable