Experimental support for building architectures separately and then lipoing them together (does not detect when files change, but at least allows compiling arm64 and armv6 in the same binary)
Properly track source file dependencies
Support platforms that don't have lipo by building multi-arch binaries classically
Merge branch 'master' into lipoplasty
Fix perl warnings on latest perl
Suppress deployment warning if IPHONE_ARCHS is set
Add compatibility shim for weak properties when using GCC (so that new headers can be paired with a out of date compiler)