[FEATURE] Add non-wrapping mode for menus

This patch adds automatic wrapping of menus' links into <nav/> tags instead of lists for minimalistic HTML5 rendering
Merge pull request #218 from bjo3rnf/nonwrapping

[FEATURE] Add non-wrapping mode for menus
[BUGFIX] Update ext_autoload.php
Merge pull request #219 from bjo3rnf/autoload

[BUGFIX] Update ext_autoload.php