Update README Markdown style to match CONTRIBUTING

README.md

 # gitlab-shell: ssh access and repository management
 
-GitLab Shell is an application that allows you to execute git commands and provide ssh access to git repositories. It is not a unix shell nor a replacement for Bash or Zsh.
+GitLab Shell is an application that allows you to execute git commands
+and provide ssh access to git repositories.
+It is not a Unix shell nor a replacement for Bash or Zsh.
 
-#### Code status
+## Code status
 
 [![CI](http://ci.gitlab.org/projects/4/status.png?ref=master)](http://ci.gitlab.org/projects/4?ref=master)
 [![Build Status](https://travis-ci.org/gitlabhq/gitlab-shell.png?branch=master)](https://travis-ci.org/gitlabhq/gitlab-shell)
 [![Code Climate](https://codeclimate.com/github/gitlabhq/gitlab-shell.png)](https://codeclimate.com/github/gitlabhq/gitlab-shell)
 [![Coverage Status](https://coveralls.io/repos/gitlabhq/gitlab-shell/badge.png?branch=master)](https://coveralls.io/r/gitlabhq/gitlab-shell)
 
+**Requires ruby 1.9+**
 
-__Requires ruby 1.9+__
-
-
-### Setup
+## Setup
 
     ./bin/install
 
-
-### Check 
+## Check
 
     ./bin/check
 
+## Repos
 
-### Repos:
- 
-
-Add repo
+Add repo:
 
     ./bin/gitlab-projects add-project gitlab/gitlab-ci.git
 
-Remove repo 
+Remove repo:
 
     ./bin/gitlab-projects rm-project gitlab/gitlab-ci.git
 
-Import repo 
+Import repo:
 
-    # Default timeout is 2 minutes 
+    # Default timeout is 2 minutes
     ./bin/gitlab-projects import-project randx/six.git https://github.com/randx/six.git 
-    
+
     # Override timeout in seconds
     ./bin/gitlab-projects import-project randx/six.git https://github.com/randx/six.git 90
 
-Fork repo
+Fork repo:
 
     ./bin/gitlab-projects fork-project gitlab/gitlab-ci.git randx
 
-Update HEAD
+Update HEAD:
 
     ./bin/gitlab-projects update-head gitlab/gitlab-ci.git 3-2-stable
 
-Create branch
+Create branch:
 
     ./bin/gitlab-projects create-branch gitlab/gitlab-ci.git 3-2-stable master
 
-Remove branch
+Remove branch:
 
     ./bin/gitlab-projects rm-branch gitlab/gitlab-ci.git 3-0-stable
 
-Create tag (lightweight & annotated)
+Create tag (lightweight & annotated):
 
     ./bin/gitlab-projects create-tag gitlab/gitlab-ci.git v3.0.0 3-0-stable 
     ./bin/gitlab-projects create-tag gitlab/gitlab-ci.git v3.0.0 3-0-stable 'annotated message goes here'
 
-Remove tag
+Remove tag:
 
     ./bin/gitlab-projects rm-tag gitlab/gitlab-ci.git v3.0.0
 
+## Keys
 
-### Keys: 
-
-
-Add key
+Add key:
 
     ./bin/gitlab-keys add-key key-782 "ssh-rsa AAAAx321..."
 
-Remove key
+Remove key:
 
     ./bin/gitlab-keys rm-key key-23 "ssh-rsa AAAAx321..."
 
-Remove all keys from authorized_keys file
+Remove all keys from authorized_keys file:
 
     ./bin/gitlab-keys clear
-