Version to 5.3

Author: dzaporozhets

CHANGELOG

@@ -24,6 +24,7 @@ v 5.3.0
   - init.d: Ensure socket is removed before starting service
   - Admin area: Style teams:index, group:show pages
   - Own page for failed forking
+  - Scrum view for milestone
 
 v 5.2.0
   - Turbolinks

VERSION

@@ -1 +1 @@
-5.3.0.beta1
+5.3.0

doc/install/installation.md

@@ -149,10 +149,10 @@ To setup the MySQL/PostgreSQL database and dependencies please see [`doc/install
     cd /home/git/gitlab
 
     # Checkout to stable release
-    sudo -u git -H git checkout 5-2-stable
+    sudo -u git -H git checkout 5-3-stable
 
 **Note:**
-You can change `5-2-stable` to `master` if you want the *bleeding edge* version, but
+You can change `5-3-stable` to `master` if you want the *bleeding edge* version, but
 do so with caution!
 
 ## Configure it
@@ -344,10 +344,10 @@ GitLab uses [Omniauth](http://www.omniauth.org/) for authentication and already
 
 These steps are fairly general and you will need to figure out the exact details from the Omniauth provider's documentation.
 
-* Add `gem "omniauth-your-auth-provider"` to the [Gemfile](https://github.com/gitlabhq/gitlabhq/blob/5-2-stable/Gemfile#L18)
+* Add `gem "omniauth-your-auth-provider"` to the [Gemfile](https://github.com/gitlabhq/gitlabhq/blob/5-3-stable/Gemfile#L18)
 * Run `sudo -u git -H bundle install` to install the new gem(s)
-* Add provider specific configuration options to your `config/gitlab.yml` (you can use the [auth providers section of the example config](https://github.com/gitlabhq/gitlabhq/blob/5-2-stable/config/gitlab.yml.example#L53) as a reference)
-* Add icons for the new provider into the [vendor/assets/images/authbuttons](https://github.com/gitlabhq/gitlabhq/tree/5-2-stable/vendor/assets/images/authbuttons) directory (you can find some more popular ones over at https://github.com/intridea/authbuttons)
+* Add provider specific configuration options to your `config/gitlab.yml` (you can use the [auth providers section of the example config](https://github.com/gitlabhq/gitlabhq/blob/5-3-stable/config/gitlab.yml.example#L53) as a reference)
+* Add icons for the new provider into the [vendor/assets/images/authbuttons](https://github.com/gitlabhq/gitlabhq/tree/5-3-stable/vendor/assets/images/authbuttons) directory (you can find some more popular ones over at https://github.com/intridea/authbuttons)
 * Restart GitLab
 
 ### Examples