install libNatNet.so as part of package

Fixes #14

motion_capture_tracking/CMakeLists.txt

@@ -5,6 +5,8 @@ if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   add_compile_options(-Wall -Wextra -Wpedantic)
 endif()
 
+set(CMAKE_INSTALL_RPATH "$ORIGIN")
+
 # find dependencies
 find_package(ament_cmake REQUIRED)
 find_package(rclcpp REQUIRED)
@@ -68,6 +70,11 @@ target_compile_features(motion_capture_tracking_node PUBLIC c_std_99 cxx_std_17)
 install(TARGETS motion_capture_tracking_node
   DESTINATION lib/${PROJECT_NAME})
 
+install(FILES 
+  ${CMAKE_CURRENT_SOURCE_DIR}/deps/libmotioncapture/deps/NatNetSDKCrossplatform/lib/ubuntu/libNatNet.so
+  DESTINATION lib/${PROJECT_NAME}
+)
+
 # if(BUILD_TESTING)
 #   find_package(ament_lint_auto REQUIRED)
 #   # the following line skips the linter which checks for copyrights