RELEASE-0.2.1

* Added a composer.json, and this package to packagist.org.
* Fixed GitHub issue #2: columnWrap() in Default Renderer eats up lines with only a EOL.
* Fixed validation of XML definition files: The directory of the RNG schema was wrong.
* Fixed test suite errors, including namespace related ones and adding Travis-CI configuration.
* Removed PEAR2\Exception dependency - This package's exception directly inherits from the root Exception.
* CS fixes.