Added Make recipes for examples

Makefile

@@ -22,10 +22,19 @@ obc.out: lib.c parser.c assembler.c obc.c
 	$(CC) $(CFLAGS) $^ -o $@ $(LIBS)
 
 OUT=
-.PHONY: run
+.PHONY: run clean examples-interpreter examples-compiler
 run: $(OUT)
 	./$^ $(ARGS)
 
-.PHONY:
+EXAMPLES=$(wildcard examples/*.bf)
+
+examples: examples-interpreter examples-compiler
+
+examples-interpreter:
+	$(foreach x, $(EXAMPLES), $(MAKE) run OUT=obi.out ARGS=$(x);)
+
+examples-compiler:
+	$(foreach x, $(EXAMPLES), $(MAKE) run OUT=obc.out ARGS=$(x) && ./a.out;)
+
 clean:
 	rm -v *.out *.o *.asm