RouterFactory: changed to static
/templates moved to /presenters
Revert "ErrorPresenter: 500.latte erases HTML output"

This partially reverts commit 554c2b5b7f7fdda908785fc997f4ad2ecf311872 and ad62e3bd565dfdaebf6199e624ce7d1d82e1b7db.
500.latte: is better displayed as part of page
light version