nginx: Add default configuration
nginx: remove unused configuration

This removes stuff related to charset translation, fastcgi, scgi, naxsi.

Additionally, it adds some comments to the main config file.
nginx: Add vim modelines to configs
nginx: Specify the "index" directive globally
nginx: Add config for tikatika.nl
uwsgi: Add default emperor configuration
uwsgi: Remove some useless emperor config

Debian ships some configuration options which aren't really needed for
our setup (uid/gid, we need to run as root to have vassals run as
different users) or with the emperor in general (running a master with
workers seems pointelss for an emperor).
uwsgi: Allow vassals in a domain subdirectory

Vassals directly in the vassals directory are also supported.
Additionally, only load vassals configs starting with app-, which allows
other files without that prefix that can be included from the vassal or
emperor config.
uwsgi: Include some defaults for vassals

These setup up most of the standard stuff, only requiring the vassals to
set the domain and app-name placeholders, to set uid/gid values and to
call the relevant app-* custom option to configure the application.
uwsgi: tikatika.nl/moinmoin: Add configuration
nginx: tikatika.nl/wiki: Update uwsgi socket