Pulled one line conditionals out into more visible if statements.

Also, altered the Ubuntu/Debian package version conditional so that
it only appends `~precise` for Riak 1.3.2 Ubuntu DEBs.
Added the Debian Wheezy platform to Test Kitchen.
Updated CHANGELOG.
Provider for RHEL and Fedora had to be altered to RPM.

Also, adjusted platform conditionals so that they use platform_family
instead.
Merge pull request #83 from basho/hc-test-kitchen-debian710

Add support for Debian Wheezy