Reformats confusing '[named here]' section for 3rd party code attribution

Weird formatting originally. Which of the following is the proper format for attribution?

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: [[] David Alexander]
1. Submitted on behalf of a third-party: [] David Alexander
1. Submitted on behalf of a third-party: [[ David Alexander ]]
1. ... _etc._

With this change, it allows for either of the following formats:

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: David Alexander

See merge request !2861

Add instructions for pushing tags as well as branches

Current instructions will push the svn branches but not tags  - add missing line to tags


See merge request !2778

Fixed ~git beeing displayed as link to issues tagged with git in architecture.md

The architecture documentation explains `~git` from the picture below which is replaced by a [link to issues tagged with `git`](https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name=git). I believe that this was unintended and should be fixed by using backticks.

![Screenshot_from_2016-02-13_21-36-30](/uploads/5ea1a60e8b230952874e58eab0abe1ac/Screenshot_from_2016-02-13_21-36-30.png)

See merge request !2814

Update commit status permissions [ci skip]

cc @axil 


See merge request !2942

Restrict permissions on public/uploads

Based on https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests/631

See merge request !2764

[ci skip]