vscode updates

* working debugging (one click build and debug)
   * SITL jmavsim
   * SITL gazebo
   * jlink px4_fmu-v{2-5}
 * improved syntax highlighting
   * GNU linker files
   * ROS message files msg/*.msg
   * jinja2 template files
 * fixed intellisense support

.vscode/extensions.json

@@ -2,12 +2,16 @@
     // See http://go.microsoft.com/fwlink/?LinkId=827846
     // for the documentation about the extensions.json format
     "recommendations": [
+        "ajshort.ros",
         "chiehyu.vscode-astyle",
+        "dan-c-underwood.arm",
         "github.vscode-pull-request-github",
         "marus25.cortex-debug",
         "ms-python.python",
         "ms-vscode.cpptools",
+        "peterjausovec.vscode-docker",
         "twxs.cmake",
-        "vector-of-bool.cmake-tools"
+        "vector-of-bool.cmake-tools",
+        "wholroyd.jinja"
     ]
-}
+}