remove old unused test suite
initialize tests with setters
add set up methods for tests
use Zend_Db instead of PDO for setup
fix wrong db name
add some more tests
update README a bit with unit tests informations
add some more tests (covering over 80%)
remove newline characters in toHtml()
remove commented code
add configuration file for atoum tests
Merge branch 'unit-tests'

Conflicts:
	library/Nestedset/Model.php