A little tool to set Xcode build settings from the command line.
You can specify the target and the configuration to set. If you don't
specify a target, the setting is changed in the project. If you don't
specify a configuration, the setting will be applied to all configurations.
Therefore specify a target and a configuration only changes the setting in
that target for that configuration.
This is basically a stripped down version of mulle_xcode_utility.
Coded by Nat!