Fixes #4 -- Make config loading blocking
Fixes #4 -- Make config loading blocking

As most pages require some information from the config, we can just
block the page loading until the config is available.

LubyRuffy/berlin-school-data,ini20/berliner-schulen,LubyRuffy/berlin-school-data,salaniz/berlin-events,MarkusH/berlin-school-data,ini20/berliner-schulen,salaniz/berlin-events,MarkusH/berlin-school-data,LubyRuffy/berlin-school-data,salaniz/berlin-events