add metadata.json (before new release)

metadata.json is now required on the forge.
further, the forge recommends we add compatibility information as far as
possible. this file is essentially copied from puppetlabs-apache.
Merge pull request #57 from cure/master

Fix syntax error in templates/forward.erb
add ALL the Operating Systems
Merge pull request #56 from igalic/metadata

add metadata.json (before new release)
Clean up some newline issues

Not having the newline was preventing my unbound server from reading the
configuration correctly.  This ammends the previos epic PR to include
newlines.  While I was at it, I devided to squash the logic to avoid
checking for an array.
Merge pull request #59 from xaque208/newlines

Clean up some newline issues
Merge remote-tracking branch 'upstream/master'