Added Debian repo creation

Added Debian Wheezy support: repo, package, service
Tested on Debian Wheezy 7.5
At now there is only current stable Wheezy and testing Jessie packages available in official repo. So, for people who wants to play with gluster on jessie i can add some parametrisation based on ::lsbdistcodename fact (expands to "wheezy or "jessie").

like this:
``` puppet
$repo_url = "${repo_base}/${repo_ver}/${::lsbdistid}/${::lsbdistcodename}"
```