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...

<transition source="idle" target="run">
	<event name="key_up|key_shift" />
</transition>
<transition source="run" target="attack">
	<event name="key_ctrl" />
	<condition expr="weapon != null" />
</transition>