Modern syntax
Modern `if` syntax ;)

astyle -t -o -O -c -xM -z2 -U -j -H *.[mhc]
Refer to frameworks/libraries via their SDK versions, as opposed to the system ones.
Rename “Apple Frameworks and Libraries” to just “Frameworks” so newly added frameworks are added there.
Fix an over-release bug.
Restore setAutomaticallyDownloadsUpdates: to the SUUpdater header as a property.
Remove pre-10.7 code.
Many changes:
Getting rid of unneeded parentheses.
Remove more pre-10.7-only code.
Add comments.
More property declarations.
Make SUUpdatePermissionPromptDelegateInformalProtocol a protocol with the name SUUpdatePermissionPromptDelegateProtocol.
We don’t need to declare ivars in the interface block if they are only accessed via accessors.
This is only true because we’re targeting x86_64 on OS X. The same is true for all iOS architectures, but not i386 on OS X.
Use CFBridgingRelease in a few places: it acts just like [(id)CFMakeCollectable(obj) autorelease] on non-ARC code, but is a bit cleaner.
We don’t need the NSAppKitVersionNumber10_[456] defined.
First, we don’t use them. Second, they should be defined since we’re targeting 10.7 and later, with at least the 10.9 SDK.
Replace NSAutoreleasePool classes with Autorelease Pool blocks.
They’re faster, even if they’re used outside of ARC.
Use dispatch functions to spin off new threads.
Update the Binary Delta tool's class to be better.
Use more Blocks/libdispatch code.
Convert Sparkle to ARC, take three.
Release 1.7
Reflect version requirement in sample appcast
Remove unused autorelease pool class usage.

Do we even still use the BinaryDelta tool?
Remove option to install unverified updates
Convert the xibs to Xcode 5.1 format.
The SUUpdateAlert wasn’t migrated in this commit because of the autolayout branch.
Migrate the SUUpdateAlert xibs to Xcode 5.
Finish moving all informal protocols to formal protocols.
Fix improperly-named protocols.
Merge branch 'master' into ARC