Merge tag '0.2' into develop

Tagging version 0.2 0.2
* Register le role sur Ansible Galaxy
* Refactoring de variables
Fix readme et ajout de l'url sur Ansible Galaxy
Add param : sessions_ratelimit
Rename tags: prefix with 'haproxy_'
Add tags usage in the Readme
A small Readme modification
Merge branch 'release/1.0'