Added support for Redis 2.8 and changed default to 2.8.3

- Removed bundled redis distribution.
- Updated the templates to avoid deprecation warnings.
Merge branch 'master' into redis-2.8

Conflicts:
	templates/redis.init.erb
Revert back to git:// protocol in .fixtures.yml.
Default to redis 2.8.11, the latest stable release.
Merge branch 'redis-2.8'

Based off of rickard-von-essen/puppet-redis.