Added readme (#15)

Author: Nyholm

Readme.md

@@ -0,0 +1,43 @@
+# Translation extractor
+
+[![Latest Version](https://img.shields.io/github/release/php-translation/extractor.svg?style=flat-square)](https://github.com/php-translation/extractor/releases)
+[![Build Status](https://img.shields.io/travis/php-translation/extractor.svg?style=flat-square)](https://travis-ci.org/php-translation/extractor)
+[![Code Coverage](https://img.shields.io/scrutinizer/coverage/g/php-translation/extractor.svg?style=flat-square)](https://scrutinizer-ci.com/g/php-translation/extractor)
+[![Quality Score](https://img.shields.io/scrutinizer/g/php-translation/extractor.svg?style=flat-square)](https://scrutinizer-ci.com/g/php-translation/extractor)
+[![Total Downloads](https://img.shields.io/packagist/dt/php-translation/extractor.svg?style=flat-square)](https://packagist.org/packages/php-translation/extractor)
+
+**Extract translation messages from source code**
+
+
+## Install
+
+Via Composer
+
+``` bash
+$ composer require php-translation/extractor
+```
+
+## Usage
+
+```php
+$extractor = new Extractor();
+
+// Create extractor for PHP files
+$fileExtractor = new PHPFileExtractor()
+
+// Add visitors
+$fileExtractor->addVisitor(new ContainerAwareTrans());
+$fileExtractor->addVisitor(new ContainerAwareTransChoice());
+$fileExtractor->addVisitor(new FlashMessage());
+$fileExtractor->addVisitor(new FormTypeChoices());
+
+// Add the file extractor to Extactor
+$extractor->addFileExtractor($this->getPHPFileExtractor());
+
+// Define where the source code is
+$finder = new Finder();
+$finder->in('/foo/bar');
+
+//Start extractring files
+$sourceCollection = $extractor->extract($finder);
+```