Revert "1.6.5"

This reverts commit 20685049feb7b95cfb0d3e01d8e4692191c551c7.
Revert "Revert "1.6.5""

This reverts commit b662d93e5fd74b68d04fe40bed3993e2da9b6563.
Revert "Added support for serving static files when routes are not found."

This reverts commit 9ff64c365cc9153cc91be9f75ad90bfc09813381.
added content-static option