Revert "almost there" per #82.

This reverts commit b7f59abc4beb884d7630bac7b085eb18919242de.

Revert "whitelist the config"

This reverts commit 9337766dc5ecb6440b6e7a142cbc2ea89842a556.

Revert "ignore the configs"

This reverts commit 39ca21fb67d59b0cf2b9110814be401548d14e64.

Revert "Whitelist Everything (Almost)"

This reverts commit d2b883092bb5c18c0ef7b06ca32b353f04bb3587.

Revert "Merge master into mass_assignment"

This reverts commit 98c4f035f6b7a9ee074efa2e9e692b15c2fa76e9, reversing
changes made to 4431a6c0f6e62b3a1ac7998b737f3d11cc31b8b9.