Merge pull request #10 from jouvin/yum_vars

Define required variable YUM_SNAPSHOT_URL_ROOT in global_variables.pan
Markdownify the README a bit
cluster umd3: use Quattor 14.5.0-rc10 to allow a successful compilation
Merge pull request #11 from jouvin/cluster.build.properties

cluster umd3: use Quattor 14.5.0-rc10 to allow a successful compilation