Git helper shell-script to move submodules within the super-repository

Usage: git-submodule-move [-v|--verbose] path/to/submodule new/path/

Example:

git-submodule-move --verbose path/to/submodule new/path/
 updating super-repository's submodule name
 updating super-repository's submodule path
 updating super-repository's submodule repository config
 updating submodule's pointer to super-repository config
 moving super-repository's submodule repository
 moving submodule directory
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   .gitmodules
#	renamed:    path/to/submodule -> /new/path/submodule
#
Please inspect the changes and if satisfied commit the change

The directory layout changes thus:

before: ./path/to/submodule
after:  ./new/path/submodule

Confirm the changes are acceptable (git status) then COMMIT them

To revert a submodule move before commiting it simply reverse the arguments. E.g.

git-submodule-move path/to/submodule new/path/
...
# On branch master
# Changes to be committed:
#  (use "git reset HEAD <file>..." to unstage)
#
#	modified:   .gitmodules
#	renamed:    path/to/submodule -> new/path/submodule
#

git-submodule-move new/path/submodule path/to/
...
# On branch master
nothing to commit, working directory clean
Please inspect the changes and if satisfied commit the change

The script can move submodules that use local (path) and external (protocol, e.g. git://) URLs in the .gitmodules file