1. Increase ref_count when creating ports, and check it on port's destroy().
2. Provide "resource compiler" for unix; it must:
	- parse Win32 rc script, for each RCDATA:
		- add to rctmp.c rcdata_unix_t struct {char name[_MAX_PATH],void *data};
	- add two function to rctmp.c:
		void libvGetResourceCount(void) { ... }
		rcdata_unix_t *libvGetResource(u32_t res_num) { ... }
	- compile rctmp.c (and optionally link it to rcXXX.so)

