To get the Airtime unit tests running:
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1) Install PHPUnit
We explicitly install PHPUnit 3.4 because that's as a new of a version
as is supported by Zend Framework 1:
sudo pear channel-discover pear.phpunit.de
sudo pear channel-discover pear.symfony.com
sudo pear channel-discover pear.symfony-project.com
sudo pear install channel://pear.symfony-project.com/YAML
sudo pear install pear.phpunit.de/PHPUnit-3.4.10
DO NOT INSTALL the DbUnit package!
DbUnit overwrites a file that's actually part of the PHPUnit package,
/usr/share/php/PHPUnit/Extensions/Database/DataSet/QueryTable.php
with a version that's incompatible and gives an error for us.
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