fix .gitignore, Makefile and README.md for 2012/konno

Rename alt source file.

2012/konno/Makefile

@@ -104,8 +104,8 @@ CINCLUDE=
 #CINCLUDE= -include stdlib.h
 #CINCLUDE= -include stdio.h
 #CINCLUDE= -include stdlib.h -include stdio.h
-#CINCLUDE= -I ${X11_INCDIR}
-#CINCLUDE= -I ${HOMEBREW_PREFIX}/include/SDL2
+#CINCLUDE= -I ${X11_INCDIR} -I ${X11_INCDIR}/X11
+#CINCLUDE= `${SDL2_CONFIG} --cflags`
 
 # Optimization
 #
@@ -129,7 +129,7 @@ CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}
 LIBS=
 #LIBS= -lm
 #LIBS= -L ${X11_LIBDIR} -lX11
-#LIBS= -L ${HOMEBREW_PREFIX}/lib -lSDL2
+#LIBS= `${SDL2_CONFIG} --libs`
 
 # C compiler to use
 #
@@ -170,8 +170,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ= ${PROG}_deobfuscate.o
-ALT_TARGET= ${PROG}_deobfuscate
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################
@@ -188,14 +188,14 @@ all: data ${TARGET}
 ${PROG}: ${PROG}.c
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
-${PROG}_deobfuscate: ${PROG}_deobfuscate.c
-	${CC} ${CFLAGS} $< -o $@ ${LIBS}
-
 # alternative executable
 #
 alt: data ${ALT_TARGET}
 	@${TRUE}
 
+${PROG}.alt: ${PROG}.alt.c
+	${CC} ${CFLAGS} $< -o $@ ${LIBS}
+
 # data files
 #
 data: ${DATA}
@@ -330,4 +330,3 @@ pluto: charon
 	@echo "dwarf is a type of planet"
 	@echo "therefore, $@ is a planet"
 	@echo "having lots of planets is good feature because supernovae can help ${MAKE} a lot of them"
-