Per-region language settings + subdomain-per-lang

Use middleware to route to the correct subdomain for the region.
Each language has its own version of the localwiki homepage, for now.
Rename i18n langs + fab fixes for better i18n support
Fab fixes for test server travis conf
fix travis
Regenerated .po files + region-redirect middleware
mapnik base layer on 'ja' regions
Update OpenLayers
Pull transations + hide all but en & ja for now
Add compiled message files
A couple of missing gettext strings
.po for new strings