Created welt2000 package with views module
Added first basic template
Imported original front page
templates: Extracted base template
Imported "Contribute" page
Imported "References" page
Moved package metadata into __about__.py file
Replaced run.py by manage.py via Flask-Script
Use Flask-Babel for translations
commands: Added "babel" submanager
app: Implemented localeselector properly
i18n: Generated translation template
i18n: Added German translation
Added /lang/<lang> route to switch display languages
app: Use babel.negotiate_locale() instead of best_match()

The babel version takes care of handling territory codes etc.