Introduce eyeo/mimeo role

This is to support ansible-playbooks.git static-website-1 branch which reimplements eyeo/devops/legacy/infrastructure static web site deployment

Our proxy mimeograph scripts is necessary to support logging POST /submit-feedback at adblockbrowser.org

(An attempt to instead use mod_security2 in Apache worked, but didn't produce the same output format, which was too onerous)

Logic mostly from modules/adblockplus/manifests/web/mimeo.pp, rewritten by Josip Rodin into Ansible-speak, with the addition of few more variables for output file, and changed the default output path to better conform to the Filesystem Hierarchy Standard

Script itself imported verbatim from modules/adblockplus/files/mimeo.py