Merge pull request #54 from b4ldr/master

rebase of pull 44
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.
Fix syntax error in templates/forward.erb
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)