Convert from Objective-C GC to ARC

Can't compile on Mavericks without doing this, so, so be it. This was
done with the Xcode conversion tool.

Signed-off-by: Greg Hurrell <greg@hurrell.net>
Let Xcode upgrade project settings

Signed-off-by: Greg Hurrell <greg@hurrell.net>
Disable GC

This setting is actually coming from buildtools, but I don't have
network connectivity at the moment, so I can't upgrade the submodule.
Applying a local override for now.

Signed-off-by: Greg Hurrell <greg@hurrell.net>
Update .gitignore

Taken from: http://www.gitignore.io/api/xcode

Included the project files that make it through the .gitignore filter.

Signed-off-by: Greg Hurrell <greg@hurrell.net>
Clean up old radar files

Not sure if anything ever came of this bug report, but regardless, this
code is unlikely to serve any useful purpose now, so removing it.

Signed-off-by: Greg Hurrell <greg@hurrell.net>
More build setting adjustments

To make sure we can build on 10.9.

Signed-off-by: Greg Hurrell <greg@hurrell.net>