mkdir test
cd test
git init
git submodule add git://github.com/robrighter/node-xml.git
cd node-xml/
git submodule add git://github.com/robrighter/node-xml.git
git commit -a -m 'add node-xml submodule'
cd ..
git commit -a -m 'add node-xml submodule'
git status
touch node-xml/node-xml/junk
git status
git status --ignore-submodules=untracked