added Makefile inside src dir

src/Makefile

@@ -0,0 +1,33 @@
+.PHONY:all
+all:
+	gcc -Wall *.c
+
+.PHONY:debug
+debug:
+	gcc -Wall -g *.c
+	gdb a.out
+
+.PHONY:run
+run:
+	gcc -Wall *.c
+	./a.out
+
+.PHONY:install
+install: a.out
+	cp a.out /usr/local/bin/ics_analyzer
+
+.PHONY:clean
+clean:
+	-rm a.out
+
+.PHONY:uninstall
+uninstall:
+	-rm /usr/local/bin/ics_analyzer
+
+.PHONY:test
+test:
+	./a.out
+	@echo
+	./a.out -h
+	@echo
+	./a.out -f ../tests/calendar.ics