Madd's improvements

Here are quite a few of my changes.

Note that you will need Xcode 4.6 or later to build it, and it'll run on Lion or later. Objective-C code has been migrated to ARC and "Modern Syntax" by Xcode 5.

10.7 or later is required to use this driver.

The old, individual projects were merged into one big Xcode project. Xcode 4/5 generated files are ignored and deleted: you may want to temporarily protect said files before merging this.