Fixes problem when page language is not configured in Arcavias locales
Merge pull request #112 from nsendetzky/master

Fixes problem when page language is not configured in Arcavias locales
Caches locale item for performance reasons
Makes sr_feuser_register truely optional
Merge pull request #113 from nsendetzky/master

Optimizes bootstrapping and makes sr_feuser_register truly optional