3.4/develop

Fully embraced the composer way of doing things, added requirement of PHP 5.4+, and added some fancy new 5.4 stuff.
I really disagree with having all the official modules listed and commented out. Having them commented out makes the assumption that when uncommented they will be enabled, which isn't the case now we are fully using composer. We shouldn't bloat the Kohana application template just because the user might use some of these things, we should assume as little about their application as possible and let them require what they need. I have added an example to the comment on how to add a module which makes it very obvious to the user already.