When installing STRI/DXA into an existing BluePrint we add the existing Publications as children of the `100 Master` but there are several Structure Groups and Pages that have to be added manually into each existing Publication:

* `assets` Structure Group
* `assets/css` Structure Group
* `assets/fonts` Structure Group
* `assets/images` Structure Group
* `assets/scripts` Structure Group
* `_System/Publish HTML Design` Page

Is there a specific reason why these are not in the BluePrint at the `100 Master` level?