Develop

List of changes:

* Started reformatting code to be PSR-2 compliant
* Created a new PSR-4 compliant autoloader
* Started implementing namespaces
* Added unit tests with PHPUnit
* Fixed some performance issues
* Dropped support for PHP <= 5.2 (People can still download older releases for older PHP versions)

Things to do:

- [ ] Add project to travis-ci
- [ ] Create a new release (proposed: 0.7.0)
- [ ] Make whole project PSR-* compliant
- [ ] Start building unit tests for every feature added