Update tests & add travis

tests/Makefile

@@ -4,15 +4,22 @@ TEST_SRC=$(wildcard ${SRC_PATH}/*_spec.cpp)
 TEST_BIN= $(TEST_SRC:${SRC_PATH}/%.cpp=${OUT_PATH}/%)
 VPATH=${SRC_PATH}
 SHIM_FILES=${SRC_PATH}/lib/*.cpp
-PSC_FILE=../PubSubClient/PubSubClient.cpp
+PSC_FILE=../PubSubClient/src/PubSubClient.cpp
 CC=g++
-CFLAGS=-I${SRC_PATH}/lib -I../PubSubClient
+CFLAGS=-I${SRC_PATH}/lib -I../PubSubClient/src
 
 all: $(TEST_BIN)
 
 ${OUT_PATH}/%: ${SRC_PATH}/%.cpp ${PSC_FILE} ${SHIM_FILES}
 	mkdir -p ${OUT_PATH}
 	${CC} ${CFLAGS} $^ -o $@
-	
+
 clean:
 	@rm -rf ${OUT_PATH}
+
+test:
+	@bin/connect_spec
+	@bin/keepalive_spec
+	@bin/publish_spec
+	@bin/receive_spec
+	@bin/subscribe_spec