Replace atoum (with phpunit?)
atoum, when it's been choosen, was a dynamic, modern test suite project. I've been very happy with it.
But now, it's been dead for years, it may stop working if there are major PHP changes.
Whan I've choosed atoum, there were a very few nuber of PHP test suites, this is still the case today. The only one that seems to be really maintained is phpunit, therefore I guess this is the better choice (and I have no one else to propose :D).