Update project settings
Update example project to Xcode 4.5
Update CocoaHTTPServer to 6625620
Conditionally include dispatch_retain/release

Use OS_OBJECT_USE_OBJC_RETAIN_RELEASE to determine if the objects will
be automatically managed by ARC. Fixes #5.
Support 10.6 and iOS 4
Update readme
Update project for Xcode 4.6
Update CocoaHTTPServer to 2.3
Remove convenience methods for SUBSCRIBE/UNSUBSCRIBE

These are UPnP specific, they don't really need to be part of the API.
Just list first year in copyright notice
Add podspec
ugh