percona 5.5 support

http://www.percona.com/software/percona-server
mysql 5.5 support

http://dev.mysql.com/doc/refman/5.5/en/
todo updates
naming convention
nginx depends on epel
for clarity
for clarity
dumb whitespace
let php-fpm pool or magento itself decide where to store session data
for clarity - memcached vars
facts! databases!
login_host does not get pulled from ~/.my.cnf :( I sa

https://github.com/ansible/ansible/issues/6761
forgot mysql superuser privs