Add support for postgres (and other sql complaint dbs)
Add support for i18n
Merge branch 'support_for_i18n'

Conflicts:
	backend/config/main.php
	frontend/config/main.php
Merge branch 'support_for_postgres'

Conflicts:
	common/models/User.php
	console/migrations/m130524_201442_init.php
Switch language for frontend to 'de'