Add --progress and --dissociate to git submodule

These patches add --progress and --dissociate options to git submodule.

The --progress option existed beforehand, but only for the update command and it was left undocumented.

Both add and update submodule commands supported --reference, but not its pair option --dissociate which allows for independent clones rather than depending on the reference.

I apologize for any errors I may have made in creation of these patches or the formatting of these emails. This is the first time I have submitted patches to a mailing list.

Casey Fitzpatrick (2):
submodule: Add --progress option to add command
submodule: Add --dissociate option to add/update commands

 Documentation/git-submodule.txt | 17 ++++++++++++++++-
 builtin/submodule--helper.c     | 17 ++++++++++++++---
 git-submodule.sh                | 13 ++++++++++++-
 t/t7400-submodule-basic.sh      | 31 +++++++++++++++++++++++++++++++
 t/t7408-submodule-reference.sh  | 17 +++++++++++++++++
 5 files changed, 90 insertions(+), 5 deletions(-)

2.17.0.1.ge0414f29c.dirty