first attempt at internationalization
improve english translation
translate navbar
add translation of longer about
fix line-up header
ugly hack to load the correct partial
Merge remote-tracking branch 'origin/i18n'

Conflicts:
	source/_nav.haml
	source/sections/_header.haml
	source/sections/_location.haml
	source/sections/_tickets.haml
Clean up YAML quotes
i18n: header → nav
Restructure locales
Prepare alt lang links
typography
Use HAML's = to call t()

`/#\{\s?(t[^\}]+)\}/` if anybody's interested
Move flash messages to locales
Update en CTA button