Adds comments to commits in the API
Drop all Postgres sequences during backup restore
Add CHANGELOG entry for sequence drop
Merge branch 'master' of dev.gitlab.org:gitlab/gitlabhq into backup_restore_drop_sequences

Conflicts:
	CHANGELOG
Merge remote-tracking branch 'origin/master' into backup_restore_drop_sequences

Conflicts:
	CHANGELOG
Merge branch 'backup_restore_drop_sequences' into 'master'

Drop all Postgres sequences during backup restore

See merge request !1226
Merge branch 'commit-comments' of https://gitlab.com/jeroenj/gitlab-ce into jeroenj/gitlab-ce-commit-comments

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	CHANGELOG
Merge branch 'master' of dev.gitlab.org:gitlab/gitlabhq