Renamed Tweak.xm to Tweak.x

We don't need Objective-C++
Use constant strings instead of preproccesor macros
Add support for BulletinBoardPlugins in iOS 7

Begin support for WeeApps, or Widgets as they are now called.
Include staging dir preparation in messages=yes
Use ARC
Build for armv7+arm64, minimum target iOS5
Preserve WeeLoaderSerializationPrefix functionality under iOS7
Make widgets work on iOS7
Use MSHook macro
Add compatibility shim for iOS6 widgets on iOS7
Use new ObjC syntax
Weak link SpringBoardUIServices so that we can load on iOS<7
Merge pull request #8 from joedj/ios7

iOS7 support with iOS6 widget compatibility