Updated "rescue" initrd build in "metro.sh".
Incorporated comments for package handling in "metro.sh".
Updated "initrd" compression in "metro.sh".
Updated "initrd" compression in "metro.sh".
Added "Minimal X.Org GUI" to "Use Cases" in "README".
Added "v2.0" release to "Version History" in "README".
Updated "$COMMIT" handling in "metro.sh".