v2.0.0

Cleanups & Updates
- added [EditorConfig file](http://editorconfig.org/)
- added [Scrutinizer-CI](https://scrutinizer-ci.com/g/Mashape/unirest-php/)
- added support for PHP 5.6 in Travis
- added [Hack Lang](http://hacklang.org/) Environment to Travis 
- updated testing to use [phpunit](https://phpunit.de/)
- various coding style, and comprehensibility fixes in accordance with [PSR-1 & PSR-2](http://www.php-fig.org/)
- added enhanced response header parser
- removed redundant code where applicable
- updated `Unirest\Request::File` signature to follow after `curl_file_create` with fallback

**Breaking Changes**

- removed PHP 5.3 *reached EOL on [14 Aug 2014](http://php.net/eol.php)*
- relocated files to `src` and `tests` as per `phpunit` standard tree structure
- renamed classes with logical name spacing to `Unirest\Request`, `Unirest\Response` & `Unirest\Method`