add unit testcase for tarscpp

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "servant/protocol"]
 	path = servant/protocol
 	url = https://github.com/TarsCloud/TarsProtocol.git
+[submodule "unittest"]
+	path = unittest
+	url = https://github.com/TarsCloud/tars-unittest.git

CMakeLists.txt

@@ -10,6 +10,10 @@ set(MYSQL_DIR_LIB "/usr/local/mysql/lib")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -O2 -Wall -Wno-deprecated")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O2 -Wall -Wno-deprecated")
 
+#for coverage statistics
+#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g -O2 -Wall -Wno-deprecated -fprofile-arcs -ftest-coverage")
+#set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -O2 -Wall -Wno-deprecated -fprofile-arcs -ftest-coverage")
+
 #set(CMAKE_BUILD_TYPE "Debug")
 
 set(TARS_VERSION "1.1.0")

unittest

@@ -0,0 +1 @@
+Subproject commit e663956b02aa72f9491f759263da89d62502f7e8