Resolves #13

Because we are using openwrt and we would like to mantain LUCI running
on it's interface we can't bind on 0.0.0.0. or 127.0.0.1 hence we must
listen on a specific ip. This will set the public ip from the group
vars to be the one where we listen

This role split the reverse proxy configuration in three files per
host. Every file belong to a different directory that is created on
the reverse proxy we use (nginx).

The server, map and upstream directives can be splitted into
different files to be included into the nginx.conf configuration.

We decided to split the reverse proxy configuration from one file to
three different files. One is the http configuration and the remaining
are the https configuration.

The dokuwiki configuration file was misplaced and the playbook
couldn't find it when creating a new istance of the wiki.

With the transition to the new ninux-compatible network we choose to
have a ip pool for vm that resides on the 10.150.42 network.
As 254 unique addresses are sufficient for our need we reduce the subnet
to a /24