Merge pull request #90 from ares/master

Improve default values support for puppet 2.7
Bump version
Automatic commit of package [rubygem-kafo] minor release [0.6.1-1].
Merge pull request #91 from ares/master

Fix default value setting
Version bump
Automatic commit of package [rubygem-kafo] minor release [0.6.2-1].
Fix default values issues

This patch should fix issues introduced on 0.6.1 and 0.6.2, we handle
default dumps separately for puppet 2.7. We keep :undef values as nil.