JsonCpp is no more a submodule

.gitmodules

@@ -1,6 +1,3 @@
 [submodule "3rd/auss"]
 	path = 3rd/auss
 	url = https://github.com/drmgc/auss.git
-[submodule "3rd/jsoncpp"]
-	path = 3rd/jsoncpp
-	url = https://github.com/open-source-parsers/jsoncpp

CMakeLists.txt

@@ -4,25 +4,20 @@ project(i3ipc++)
 option(I3IPCpp_WITH_TESTS "Build unit tests executables" OFF)
 option(I3IPCpp_BUILD_EXAMPLES "Build example executables" OFF)
 
-set(BUILD_STATIC_LIBS ON)
-set(BUILD_SHARED_LIBS OFF)
-add_subdirectory(3rd/jsoncpp)
-UNSET(BUILD_STATIC_LIBS)
-UNSET(BUILD_SHARED_LIBS)
-
 find_package(PkgConfig)
 pkg_check_modules(SIGCPP REQUIRED sigc++-2.0)
+pkg_check_modules(JSONCPP REQUIRED jsoncpp)
 
 include_directories(
 	${SIGCPP_INCLUDE_DIRS}
-	3rd/jsoncpp/include
+	${JSONCPP_INCLUDE_DIRS}
 	3rd/auss/include
 	include/i3ipc++
 )
 
 link_directories(
 	${SIGCPP_LIBRARY_DIRS}
-	3rd/jsoncpp/src/lib_json/
+	${JSONCPP_LIBRARY_DIRS}
 )
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wextra -Wno-unused-parameter")
@@ -38,7 +33,7 @@ set(I3IPCpp_INCLUDE_DIRS
 	3rd/auss/include
 	${CMAKE_CURRENT_SOURCE_DIR}/include/
 )
-set(I3IPCpp_LIBRARIES i3ipc++_static ${SIGCPP_LIBRARIES} jsoncpp_lib_static)
+set(I3IPCpp_LIBRARIES i3ipc++_static ${SIGCPP_LIBRARIES} ${JSONCPP_LIBRARIES})
 
 set(I3IPCpp_LIBRARY_DIRS ${I3IPCpp_LIBRARY_DIRS} PARENT_SCOPE)
 set(I3IPCpp_INCLUDE_DIRS ${I3IPCpp_INCLUDE_DIRS} PARENT_SCOPE)