Adds composer support

Author: djonas-noip

README.md

@@ -6,7 +6,16 @@ See what packages have changed after you run `composer update` by comparing comp
 Requires:
 - php >= 5.3
 
-There are no other dependencies. Just copy the file to `/usr/local/bin`.
+There are no other dependencies.
+
+Install
+-------
+
+```bash
+composer global require davidrjonas/composer-lock-diff:^1.0@dev
+```
+
+Or just copy the 'composer-lock-diff' to `/usr/local/bin`.
 
 Usage
 =====

composer.json

@@ -0,0 +1,13 @@
+{
+    "name": "davidrjonas/composer-lock-diff",
+    "description": "See what has changed after a composer update.",
+    "authors": [{
+        "name": "David Jonas",
+        "homepage": "https://github.com/davidrjonas"
+    }],
+    "type": "library",
+    "license": "MIT",
+    "require": {},
+    "bin": ["composer-lock-diff"],
+    "extra": { "branch-alias": { "dev-master": "1.0.x-dev" }}
+}