Stratum 0 and Stratum 1 support

This is the first puppet-cvmfs module that supports installation of a CvmFS server or a CvmFS stratum one. Only the 2.1 version of CvmFS is supported for the server.

A server

class{'cvmfs::server':
   repo => 'ilc.example.org',
}

A stratum one

cvmfs::one{'mice.example.org':
  origin => 'http://cvmfs01.example.org/cvmfs',
  keys   => ['/etc/cvmfs/keys/example1.pub','/etc/cvmfs/keys/example1.pub']
}