Adds variables for aof support to redis.conf.erb and server.pp.
Fix values in redis.conf.erb and server.pp to be more sane. Improved clarity of conditionals.
duplicate variable in server.pp
Add README.md information for new variable.
Merge branch 'add_aof_support' of https://github.com/mwillson2/puppet-redis-1 into mwillson2-add_aof_support

Conflicts:
	README.md
	manifests/server.pp
Merge branch 'mwillson2-add_aof_support'