Remove submodule, use the system Sprout

CMakeLists.txt

@@ -5,6 +5,8 @@ list (APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules)
 include(shared_git_project)
 include(CTest)
 
+find_package(Sprout REQUIRED)
+
 set(DUCKHANDY_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
 if (BUILD_TESTING)
 	set(BUILD_TESTS CACHE BOOL ON)
@@ -30,15 +32,16 @@ target_compile_features(${PROJECT_NAME}
 
 target_include_directories(${PROJECT_NAME}
 	INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/include
-	INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/lib/sprout
 )
+target_include_directories(${PROJECT_NAME} SYSTEM
+	INTERFACE ${SPROUT_INCLUDE_DIRS}
+)
+
 target_compile_definitions(${PROJECT_NAME}
 	INTERFACE SPROUT_NO_CXX11_NUMERIC_LIMITS
 	INTERFACE SPROUT_USE_TEMPLATE_ALIASES
 )
 
-add_subdirectory(lib/sprout)
-
 if (BUILD_TESTING)
 	add_subdirectory(test/unit)
 endif()