Update README to indicate being on Stackforge

This change updates the reference to Stackforge and also fixes
capitalization of OpenStack in the README. It also fixes a few minor
issues that were failing check tests.

Change-Id: I3bc4fc8515c1b3d56d789f1bb199e2cd512e6dbe
Package for share service

Package for manila-share service is available also for RedHat derivatives
as can be seen at http://koji.fedoraproject.org/koji/buildinfo?buildID=581039

Change-Id: Iac260d9e00803be61ead607e44383af0e19b69f7
Switch to metadata.json for Puppet forge releases

Since puppet 3.x, Puppet Labs Forge accept only the metadata.json file
for module description (Modulefile is now deprecated).

This patch :
 - convert the Modulefile to metadata.json.
 - bump major version to 5 (for juno).
 - switch to stackforge namespace.
 - relax pe version_requirement to 3.x.

Change-Id: If1c15386b92c7fc9f9bbd3311f6417bde21d2f2f
Merge "Switch to metadata.json for Puppet forge releases"