add rebuilding of authorized_keys to docs
add correct path to rebuild-keys doc
Merge branch 'rebuild-keys' into 'master'

Rebuild keys

This was clearly lacking for the documenation.

See merge request !1267
you have to update gitlab shell for gitlab 7.5
Merge branch 'shell220' into 'master'

Add GitLab shell update to update guide

See merge request !1269
Possibility to create Milestones or Labels when Issues are disabled
Merge branch 'milestones_labels' into 'master'

Possibility to create Milestones or Labels when Issues are disabled

https://dev.gitlab.org/gitlab/gitlabhq/issues/1682

See merge request !1270