Merge branch 'add_titles_to_help_pages' into 'master'

Add titles to help pages

Fixes #1183

doc/api/deploy_keys.md

-## Deploy Keys
+# Deploy Keys
 
 ### List deploy keys
 

doc/api/groups.md

+# Groups
+
 ## List project groups
 
 Get a list of groups. (As user: my groups, as admin: all groups)

doc/api/issues.md

+# Issues
+
 ## List issues
 
 Get all issues created by authenticated user. This function takes pagination parameters

doc/api/merge_requests.md

+# Merge requests
+
 ## List merge requests
 
 Get all merge requests for this project.

doc/api/milestones.md

+# Milestones
+
 ## List project milestones
 
 Returns a list of project milestones.

doc/api/notes.md

+# Notes
+
 Notes can be wall notes or comments on snippets, issues or merge requests.
 
 ## Wall

doc/api/project_snippets.md

+# Project snippets
+
 ## List snippets
 
 Get a list of project snippets.

doc/api/projects.md

-## Projects
+# Projects
 
 ### List projects
 

doc/api/repositories.md

+# Repositories
+
 ## List project repository tags
 
 Get a list of repository tags from a project, sorted by name in reverse alphabetical order.

doc/api/repository_files.md

-# CRUD for repository files
+# Repository files
+
+## CRUD for repository files
 
 ## Create, read, update and delete repository files using this API
 

doc/api/session.md

+# Session
+
 Login to get private token
 
 ```

doc/api/system_hooks.md

+# System hooks
+
 All methods require admin authorization.
 
 The url endpoint of the system hooks can be configured in [the admin area under hooks](/admin/hooks).

doc/api/users.md

+# Users
+
 ## List users
 
 Get a list of users.

doc/install/database_mysql.md

+# Database Mysql
+
 ## Note
 
 We do not recommend using MySQL due to various issues. For example, case [(in)sensitivity](https://dev.mysql.com/doc/refman/5.0/en/case-sensitivity.html) and [problems](http://bugs.mysql.com/bug.php?id=65830) that [suggested](http://bugs.mysql.com/bug.php?id=50909) [fixes](http://bugs.mysql.com/bug.php?id=65830) [have](http://bugs.mysql.com/bug.php?id=63164).

doc/install/installation.md

+# Installation
+
 # Select Version to Install
 Make sure you view [this installation guide](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/install/installation.md) from the branch (version) of GitLab you would like to install. In most cases
 this should be the highest numbered stable branch (example shown below).

doc/install/requirements.md

-# Operating Systems
+# Requirements
+
+## Operating Systems
 
 GitLab is developed for the Linux operating system. For the installations options and instructions please see [the installation section of the readme](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/README.md#installation).
 

doc/legal/corporate_contributor_license_agreement.md

+# Corporate contributor license agreement
+
 You accept and agree to the following terms and conditions for Your present and future Contributions submitted to GitLab B.V.. Except for the license granted herein to GitLab B.V. and recipients of software distributed by GitLab B.V., You reserve all right, title, and interest in and to Your Contributions.
 
 1. Definitions.

doc/legal/individual_contributor_license_agreement.md

+# Individual contributor license agreement
+
 You accept and agree to the following terms and conditions for Your present and future Contributions submitted to GitLab B.V.. Except for the license granted herein to GitLab B.V. and recipients of software distributed by GitLab B.V., You reserve all right, title, and interest in and to Your Contributions.
 
 1. Definitions.

doc/markdown/markdown.md

+# Markdown
+
 ----------------------------------------------
 
 Table of Contents

doc/permissions/permissions.md

+# Permissions
+
 Users have different abilities depending on the access level they have in a particular group or project.
 If a user is both in a project group and in the project itself, the highest permission level is used.
 If a user is a GitLab administrator they receive all permissions.

doc/public_access/public_access.md

+# Public access
+
 Gitlab allows you to open selected projects to be accessed **publicly** or **internally**.
 Projects with either of these visibility levels will be listen in the [public access directory](/public).
 Internal projects will only be available to authenticated users.

doc/raketasks/backup_restore.md

+# Backup restore
+
 ### Create a backup of the GitLab system
 
 Creates a backup archive of the database and all repositories. This archive will be saved in backup_path (see `config/gitlab.yml`).

doc/raketasks/cleanup.md

+# Cleanup
+
 ### Remove garbage from filesystem. Important! Data loss!
 
 Remove namespaces(dirs) from `/home/git/repositories` if they don't exist in GitLab database.

doc/raketasks/import.md

+# Import
+
 ### Import bare repositories into GitLab project instance
 
 Notes:

doc/raketasks/maintenance.md

+# Maintenance
+
 ### Gather information about GitLab and the system it runs on
 
 This command gathers information about your GitLab installation and the System

doc/raketasks/user_management.md

+# User management
+
 ### Add user as a developer to all projects
 
 ```bash

doc/raketasks/web_hooks.md

+# Web hooks
+
 ### Add a web hook for **ALL** projects:
 
     RAILS_ENV=production bundle exec rake gitlab:web_hook:add URL="http://example.com/hook"

doc/release/monthly.md

 # Monthly Release
+
 NOTE: This is a guide for GitLab developers.
 
 # **15th - Code Freeze & Release Manager**

doc/release/patch.md

 # Things to do when doing a patch release
+
 NOTE: This is a guide for GitLab developers. If you are trying to install GitLab see the latest stable [installation guide](install/installation.md) and if you are trying to upgrade, see the [upgrade guides](update).
 
 ## When to do a patch release

doc/release/security.md

 # Things to do when doing an out-of-bound security release
+
 NOTE: This is a guide for GitLab developers. If you are trying to install GitLab see the latest stable [installation guide](install/installation.md) and if you are trying to upgrade, see the [upgrade guides](update).
 
 ## When to do a security release

doc/security/rack_attack.md

+# Rack attack
+
 To prevent abusive clients doing damage GitLab uses rack-attack gem.
 If you installed or upgraded GitLab by following the official guides this should be enabled by default.
 If you are missing `config/initializers/rack_attack.rb` the following steps need to be taken in order to enable protection for your GitLab instance:

doc/ssh/deploy_keys.md

+# Deploy keys
+
 Deploy keys allow read-only access one or multiple projects with a single SSH key.
 
 This is really useful for cloning repositories to your Continuous Integration (CI) server.

doc/ssh/ssh.md

+# SSH keys
+
 SSH key allows you to establish a secure connection between your computer and GitLab
 
 

doc/system_hooks/system_hooks.md

+# System hooks
+
 Your GitLab instance can perform HTTP POST requests on the following events: `create_project`, `delete_project`, `create_user`, `delete_user` and `change_team_member`.
 
 System hooks can be used, e.g. for logging or changing information in a LDAP server.

doc/web_hooks/web_hooks.md

+# Web hooks
+
 Project web hooks allow you to trigger an URL if new code is pushed or a new issue is created.
 
 ---

doc/workflow/authorization_for_merge_requests.md

+# Authorization for Merge requests
+
 There are two main ways to have a merge request flow with GitLab: working with protected branches in a single repository, or working with forks of an authoritative project.
 
 ## Protected branch flow

doc/workflow/project_features.md

+# Project features
+
 When in a Project -> Settings, you will find Features on the bottom of the page that you can toggle.
 Below you will find a more elaborate explanation of each of these.
 

doc/workflow/workflow.md

+# Workflow
+
 1. Clone project
 
   ```bash