Added advanced Heavy Hitter Detection example (#136)

* Added advanced Heavy Hitter Detection example

* Changed directory location

* Restored skeleton version

* Added files for common run infra with the other tutorials

* Updated readme

* Autogenerate setup rules

* Commends in simple_router.p4

* Fix typos

* Removed commended out lines

Teaching/utils/Makefile

@@ -0,0 +1,42 @@
+BUILD_DIR = build
+PCAP_DIR = pcaps
+LOG_DIR = logs
+
+TOPO = topology.json
+P4C = p4c-bm2-ss
+RUN_SCRIPT = ../utils/run_exercise.py
+
+source := $(wildcard *.p4)
+outfile := $(source:.p4=.json)
+
+compiled_json := $(BUILD_DIR)/$(outfile)
+
+# Define NO_P4 to start BMv2 without a program
+ifndef NO_P4
+run_args += -j $(compiled_json)
+endif
+
+# Set BMV2_SWITCH_EXE to override the BMv2 target
+ifdef BMV2_SWITCH_EXE
+run_args += -b $(BMV2_SWITCH_EXE)
+endif
+
+all: run
+
+run: build
+	sudo python $(RUN_SCRIPT) -t $(TOPO) $(run_args)
+
+stop:
+	sudo mn -c
+
+build: dirs $(compiled_json)
+
+$(BUILD_DIR)/%.json: %.p4
+	$(P4C) --p4v 16 $(P4C_ARGS) -o $@ $<
+
+dirs:
+	mkdir -p $(BUILD_DIR) $(PCAP_DIR) $(LOG_DIR)
+
+clean: stop
+	rm -f *.pcap
+	rm -rf $(BUILD_DIR) $(PCAP_DIR) $(LOG_DIR)