Remove GC build configuration
Bump deployment target to Lion.
Work around format string literal warning.
Work around AuthorizationExecuteWithPrivileges deprecation.
Deploy to modern Mac runtime
Rewrite SUDSAVerifier using 10.7 Security.
Fix analyzer warnings.
Convert to ARC.
Remove Tiger and below bits.
Clean up constants, use of NSAppKitVersionNumber
More weak linking cleanups
Use safer/faster NSMapTable for SUUpdater storage
Remove CFBridging silliness.
Formalize delegates, use blocks where applicable.
Excise NSThread dispatches in favor of GCD
Modernize SUUpdateDriver and subclasses.
Modernize SUUpdater.
More modern cleanups.
Reimplement deprecated AuthorizationExecuteWithPrivileges.