Updated README.md

Author: secondtruth

README.md

@@ -8,21 +8,53 @@ How to use?
 -----------
 
 ```php
-use Secondtruth\Compiler\Compiler;
-
 $compiler = new Compiler(PROJECT_PATH);
 
-$compiler->addIndexFile('mycoolprogram.php');
+$compiler->addIndexFile('bin/mycoolprogram.php');
 $compiler->addDirectory('libraries');
 
 $compiler->addFile('vendor/autoload.php');
 $compiler->addDirectory('vendor/composer', '!*.php');
-$compiler->addDirectory('vendor/symfony/console/Symfony/Component/Console', ['Tests/*', '!*.php']);
+$compiler->addDirectory('vendor/.../Component/Console', ['Tests/*', '!*.php']);
 
 $compiler->compile("$outputDir/mycoolprogram.phar");
 ```
 
 
+Installation
+------------
+
+### Install via Composer
+
+Create a file called `composer.json` in your project directory and put the following into it:
+
+```
+{
+    "require": {
+        "secondtruth/phar-compiler": "dev-master"
+    }
+}
+```
+
+[Install Composer](https://getcomposer.org/doc/00-intro.md#installation-nix) if you don't already have it present on your system:
+
+    $ curl -sS https://getcomposer.org/installer | php
+
+Use Composer to [download the vendor libraries](https://getcomposer.org/doc/00-intro.md#using-composer) and generate the vendor/autoload.php file:
+
+    $ php composer.phar install
+
+Include the vendor autoloader and use the classes:
+
+```php
+namespace Acme\MyApplication;
+
+use Secondtruth\Compiler\Compiler;
+
+require_once 'vendor/autoload.php';
+```
+
+
 Requirements
 ------------