Added tests for System module
Replaced `require_once` with `require` in layout files
Fixed ControllerTestCase
Added tests for Test module :)
Added test for `test/bootstrap` controller
Added test for `test/closure` controller
Merge pull request #161 from AntonShevchuk/master

Added tests for System module
Added test for `test/ajax` controller
Added test for `test/bootstrap` controller
Added test for `test/closure` controller