*Issues still to be tackled in this repo:*
-* Show the reason why working directories of submodules are dirty (new/untracked content and/or modified content) in superproject
+* Show the reason why working directories of submodules are dirty (new/untracked content and/or modified content) in superproject (in progress)
* Showing that a submodule has a HEAD not on any branch in "git status" (in progress)
* gitk: Add popup menu for submodules to see the detailed history of changes
* Check before a push in the superproject that all submodules HEADs are pushed