- Clarify LICENSE

- Add LICENSE_FILE
- Drop unneeded WX_UNICODE

graphics/delaboratory/Makefile

@@ -10,13 +10,13 @@ MASTER_SITES=	GOOGLE_CODE
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Unique image postprocessing application
 
-LICENSE=	GPLv3
+LICENSE=	GPLv3 # or later
+LICENSE_FILE=	${WRKSRC}/COPYING
 
 USES=		compiler:c++11-lib gmake
 MAKE_ARGS=	CXX="${CXX}" WXCONFIG="${WX_CONFIG}"
 USE_WX=		3.0
 USE_CXXSTD=	c++11
-WX_UNICODE=	yes
 
 PLIST_FILES=	bin/${PORTNAME}