Add a configuration step to check that the default timezone is set

[mpodolian]

This fixes issue #119.
No unit test, as ini_set / ini_get functions are hard to mock.

[mnapoli]

Hi, thank you for contributing!

This is a very clean PR but I think it might be better to put the date_default_timezone_set() call directly in bin/couscous. The reason is that it's just a simple system call (so it's fine if it's hardcoded somewhere, as you said we don't test it), and also (mainly) because there might be some code executed before this step that might raise the issue.

[mpodolian]

Agreed, setting it up in the Step felt weird, as it is not project related.

[mnapoli]

Thanks!

[mnapoli]

This has been released as 1.3.2 thank you!