git method to install and update submodules

git-commands

# commandline to initialize and download submodules
git submodule init
git submodule update

# commandline command to add commit to and close issue
# use any of these in your commit message:
# - fixes #xxx
# - fixed #xxx
# - fix #xxx
# - closes #xxx
# - close #xxx
# - closed #xxx

# only use #xxx to commit to (but not close) an issue

# update a remote repository link
git remote set-url origin ssh://newhost.com/usr/local/gitroot/myproject.git

# edit and fix merge conflicts
git mergetool