Add a redis module

Needs two additional alternative repos:
 * EPEL (https://fedoraproject.org/wiki/EPEL)
 * remi (http://blog.famillecollet.com/)
remove redundant dependency on EPEL repo
ensure redis is running
Merge remote-tracking branch 'redis/master'. Closes #1.

Conflicts:
	manifests/tomcat-server.pp
Merge branch 'add-redis'