improved testing and added general Makefile

interpreter/Makefile

@@ -0,0 +1,16 @@
+CC=gcc
+objects= stack.o method_dispatcher/method_dispatcher.o interpreter/core_methods.o interpreter/interpreter.o
+
+all: $(objects) test
+
+CFLAG= -c -O -o
+
+%.o: %.c
+	$(CC) $(CFLAG) $@ $<
+
+.PHONY: test
+
+test:
+	cd test && make
+	cd method_dispatcher/test && make
+	cd interpreter/test && make