Use composer for dependency management

.gitignore

@@ -23,4 +23,5 @@ variants/*/cache/
 variants/KnownWorld_901/
 ghostRatingData.*
 gr.php
-adminInfo.php
+adminInfo.php
+vendor/

README.txt

@@ -55,6 +55,14 @@ Edit config.sample.php to work with your setup, being very careful to read the w
 about security issues. The salts/secrets, errorlog/orderlog directories, can all
 leave your server wide open if you don't set them right. Rename to config.php when ready.
 
+=> Composer
+
+Install Composer via https://getcomposer.org/. Then run:
+
+    composer install
+
+This will install all external dependencies that webDiplomacy uses.
+
 => Log-on
 Once you've set config.php up you can use the random gameMasterSecret you entered
 to authenticate as the admin. First create a user via the registration page, then 

composer.json

@@ -0,0 +1,18 @@
+{
+  "name": "kestasjk/web-diplomacy",
+  "description": "webDiplomacy",
+  "keywords": ["diplomacy"],
+  "type": "project",
+  "repositories": [],
+  "require": {
+    "php": "^7.0"
+  },
+  "require-dev": {},
+  "config": {
+    "preferred-install": "dist",
+    "sort-packages": true,
+    "optimize-autoloader": true
+  },
+  "minimum-stability": "dev",
+  "prefer-stable": true
+}

header.php

@@ -47,6 +47,7 @@ function setExpires($expires) {
 if( !defined('IN_CODE') )
 	define('IN_CODE', 1); // A flag to tell scripts they aren't being executed by themselves
 
+require_once 'vendor/autoload.php';
 require_once('config.php');
 
 require_once('global/definitions.php');