Improve application manangement and create desktop entries for available app

external/xdg/CMakeLists.txt

@@ -0,0 +1,24 @@
+# We have to manually alter the cxx flags to have a working 
+# travis-ci build. Its container-based infrastructure only features 
+# a very old cmake that does not support the more current:
+#   set_property(TARGET xdg_test PROPERTY CXX_STANDARD 11)
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+
+find_package(Boost COMPONENTS filesystem system unit_test_framework)
+
+include_directories(
+    .
+    ${Boost_INCLUDE_DIRS}
+)
+
+add_library(xdg xdg.cpp)
+set_property(TARGET xdg PROPERTY CXX_STANDARD 11)
+target_link_libraries(xdg ${Boost_LIBRARIES})
+
+enable_testing()
+add_definitions(-DBOOST_TEST_DYN_LINK -DBOOST_TEST_MAIN -DBOOST_TEST_MODULE=xdg)
+add_executable(xdg_test xdg_test.cpp)
+set_property(TARGET xdg_test PROPERTY CXX_STANDARD 11)
+target_link_libraries(xdg_test xdg)
+
+add_test(xdg_test xdg_test)