Update readme

README.md

@@ -1,40 +1,71 @@
 ApcCache
 =============
 
-The Alternative PHP Cache (APC) is a free and open opcode cache for PHP. Its goal is to provide a
-free, open, and robust framework for caching and optimizing PHP intermediate code. This class is in
-simple form, an Abstraction to the APC Library.
+The Alternative PHP Cache ([APC](http://www.php.net/manual/en/book.apc.php)) is a free and open opcode cache for PHP.
+Its goal is to provide a free, open, and robust framework for caching and optimizing PHP intermediate code. This class
+is in simple form, an Abstraction to the APC Library.
 
 
+## Setup ##
+
+ Add a `composer.json` file to your project:
+
+```javascript
+{
+  "require": {
+      "rcastera/apc": "v1.0.0"
+  }
+}
+```
+
+Then provided you have [composer](http://getcomposer.org) installed, you can run the following command:
+
+```bash
+$ composer.phar install
+```
+
+That will fetch the library and its dependencies inside your vendor folder. Then you can add the following to your
+.php files in order to use the library
+
+```php
+require 'vendor/autoload.php';
+```
+
+Then you need to `use` the relevant class, for example:
+
+```php
+use rcastera\Apc\ApcCache;
+```
+
 Example
 -----------
-    <?php
-    require 'vendor/autoload.php';
-
-    use rcastera\Apc\ApcCache;
+```php
+require 'vendor/autoload.php';
 
-    // Create a new object with properties to store in cache.
-    $object = new stdClass;
-    $object->name = 'Richard';
-    $object->age = 30;
+use rcastera\Apc\ApcCache;
 
-    // Store the object in cache.
-    ApcCache::store('rich', $object, 3600);
+// Create a new object with properties to store in cache.
+$object = new stdClass;
+$object->name = 'Richard';
+$object->age = 30;
 
-    // Now check if it exists and fetch it.
-    if (ApcCache::exists('rich')) {
-        $person = ApcCache::fetch('rich');
-    }
+// Store the object in cache.
+ApcCache::store('rich', $object, 3600);
 
-    // Output the name property value.
-    echo $person->name;
+// Now check if it exists and fetch it.
+if (ApcCache::exists('rich')) {
+    $person = ApcCache::fetch('rich');
+}
 
-    // Delete this specific key in cache.
-    ApcCache::delete('rich');
+// Output the name property value.
+echo $person->name;
 
-    // Delete all cache.
-    ApcCache::clear();
+// Delete this specific key in cache.
+ApcCache::delete('rich');
 
+// Delete all cache.
+ApcCache::clear();
+```
 
 
 Contributing