Making it clear that "title" is required for ARMs

Signed-off-by: Luke Kanies <luke@puppetlabs.com>
Adding simplistic Armature validation

I basically just run through the metadata files and make sure
the file parses and required attributes are present.

Signed-off-by: Luke Kanies <luke@puppetlabs.com>
Merge pull request #31 from lak/master

Adding Armature validation