Merge branch 'remove_lfs_remark' into 'master'

## Git LFS remark

If you want to play with git-lfs (https://git-lfs.github.com/) on GitLab, you should do the following:

 * Install LFS-server (no production-ready implementation yet, but you can use https://github.com/github/lfs-test-server) on any host;

 * Add some user on LFS-server (for example: user ```foo``` with password ```bar```);

 * Add ```git-lfs-authenticate``` script in any PATH-available directory on GIT-server like this:

```

#!/bin/sh

echo "{

  \"href\": \"http://lfs.test.local:9999/test/test\",

  \"header\": {

    \"Authorization\": \"Basic `echo -n foo:bar | base64`\"

  }

}"

 ```

After that you can play with git-lfs (git-lfs feature will be available via ssh protocol).

This design will work without a script git-lfs-authenticate, but with the following limitations:

 * You will need to manually configure lfs-server URL for every user working copy;

 * SSO don't work and you need to manually add lfs-server credentials for every user working copy (otherwise, git-lfs will ask for the password for each file).

Useful links:

 * https://github.com/github/git-lfs/tree/master/docs/api - Git LFS API, also contains more information about ```git-lfs-authenticate```;

 * https://github.com/github/git-lfs/wiki/Implementations - Git LFS-server implementations.

Starting with GitLab 8.12, GitLab supports Git LFS authentication through ssh.