Code review comment for lp:~schwann/gallery-app/gallery-remove-directory-includes

A suggestion: since #include statements are not prefixed with the subproject directory anymore, I would group them by subproject and separate each group with a blank line, and prefix it with a comment with the name of the subproject, e.g.:

    // core
    #include "container-source.h"
    #include "selectable-view-collection.h"

    // media
    #include "media-collection.h"

    // util
    #include "collections.h"
    #include "resource.h"