Although it's the default behaviour, explicitly tell travis to install composer packages with the --dev option.
Changed the required PHPUnit version to 3.7, as 3.8 requires php >=5.4.7.
Fixed the phpunit config file. The path to the asseter testsuite was wrong, it was missing a path part.
The asseter test class was not compling with PSR-0.
Included a basic test to see that PHPUnit is working fine.
Modified the README file to include a general description of the package.
Modified the docblock's description.