Add direct links

Author: remdex

docs/upgrading.md

@@ -26,6 +26,8 @@ It has a folder `lib/vendor` in it so you don't need to install composer thing y
       1. In your browser, enter `https://example.com/upgrade.php` to update the database directly. 
 4. Log out from LHC.
 5. [Download the most recent LHC version](http://livehelperchat.com/article/static/5) Overwrite `doc`,`ezcomponents`,`lib`,`modules`,`pos`,`translations`,`design` folders. Also, overwrite `index.php` and `cron.php` files with the new version.
+   1. https://github.com/remdex/livehelperchat/archive/master.zip - latest master branch zip without composer denpendencies
+   2. https://github.com/LiveHelperChat/livehelperchat/releases - latest release with composer dependencies.
 6. Overwrite `composer.json` and `composer.lock` files and run `composer install` or `composer update` command.
 7. Disable [cache in settings.ini.php](debug.md#disabling-cache)
 8. Log in to LHC again and go to `"System configuration" -> "Clear Cache" and click Clear Cache`