New confine-utils repository

Since I didn't know where to publish my script for generating configuration files for all tinc hosts in a testbed's management network, and Marc pointed out that people used to ask for repositories for very small projects, we decided to create the confine-utils project and repository for hosting assorted utilities related with CONFINE testbeds. We reused the repo of Pau's firmware generator conFW (now in the confw subdir) and I also uploaded my script there (under fetch-tinc-hosts). I wanted the script to use no external dependencies but it turned out that urllib2 isn't well suited for REST API programming, so I used the excellent requests library. Now you can generate all the tinc host configuration files needed by e.g. a gateway by running python REST_API_BASE_URI.