upgrade Xcode settings
unrustle Xcode's jimmies

a certain developer preview doesn't appreciate classes with no specified superclass
Revert "upgrade Xcode settings"

This reverts commit 5fcc425eaa5cd992d3f477f69148e4a0406c7670.
updated for Xdacted but without the automatic architecture stuff
Merge pull request #4 from github/update-xcode

Updates for Xdacted