Move RbacDefinitionConfigHandlerTest.php to RbacdefinitionConfigHandlerTest.php (fixes tests)
Improving the speed of array key lookups that use array_key_exists, closes #693
Fix typo, refs #693
Make AgaviConfig handle empty strings properly, closes #692
merging 2256e1c8b4c3c5e9f6a9ce844b25bc93b6809146...9a93e99b878615b9c05ce11a79bd64d7ab61508c