Add additional options to disk-usage-metrics.rb
  Ignore mountpoints by regex pattern (-i)
  Include only specific mountpoints by regex pattern (-I)
  Replace subdir breaks with '_' instead of '.' using the --flatten option
Various styling fixes
Oops... fix typo (left trailing slash in %r{})
Merge pull request #295 from bclarkindy/disk_usage_metrics

Add additional options to disk-usage-metrics.rb