Supports PSR-0 and Composer

Set up to support the Composer and PSR-0. Now just submit to Packagist.org.

References: 
www.packagist.org
www.php-fig.org/psr/psr-0

You can create a composer.json file for test
```json
{
  "minimum-stability": "dev",
	"require": {
		"saguitech/canary": "v0.1-alpha1"
	},
	"repositories": [
    {
      "type": "git",
      "url": "https://github.com/jonataa/Canary"
    }
  ]
}
```