move to new build system

cmake/libraries/gtkmm.cmake

@@ -0,0 +1,14 @@
+if(PROJECT_ENABLE_GTKMM)
+  if(PROJECT_BUILD)
+    pkg_check_modules(GTKMM REQUIRED gtkmm-${GTKMM_VERSION})
+
+    add_definitions(
+      -DPROJECT_ENABLE_GTKMM
+      ${GTKMM_DEFINITIONS}
+    )
+
+    include_directories(${GTKMM_INCLUDE_DIRS})
+    link_directories(${GTKMM_LIBRARY_DIRS})
+    link_libraries(${GTKMM_LIBRARIES})
+  endif()
+endif()