Allow automatic reinitialisation of page title segment array in meta helper.
Meta helper improvements.

You can now actually call functions on the core meta helper.
The meta package has been updated with a couple of small fixes.
Added two default meta tags important for all pages.
Added support for navbar items with no links.

They're treated as header elements, and will be surrounded with a label
tag.
Re-saved the navbar helper with proper unix line endings.

I'm not quite sure how I mucked this up to begin with.