Change from Class to Defined Type

Hi Dude. I kinda changed all the things for the feature to create multiple backups on a single server. I tried to make so it was sane for all use cases, but I usually mess up for one or another. 

This should let you use the class to install the script, create the /etc/ and /var/backup directories and example files. Then each instance of automysqlbackup::backup will create a new configuration file and cron job. It also lets you pass automysqlbackup::config as a hash of hashes from hiera to create all those instances via a ENC. I've tested it on CentOS 6.4 and Puppet 3.2.2. 

This is not backwards compatible to any users of your module. Please point out anything dumb I did.