osx: clean up includes, we do not need cocoa what we *do* need is the very basics that animia already depends on anyway. these are basically guaranteed to be on any macos system, making it fairly portable now... I haven't tested this :) I don't have a macos machine right now...

<?xml version="1.0"?>
<network>
	<animation clip="idle" flags="loop" />
	<animation clip="run" flags="loop" />
	<animation clip="attack" />

	<?include transitions.xml?>
</network>