In my PHP project I use composer. For some reasons (stupid, but it's not depending on me) I must store all project files in a git repository, including "vendor/" files fetched by composer. I've removed "vendor/" from the .gitignore file, but some modules (like https://github.com/RWOverdijk/AssetManager) are treated as submodules - and they are not being added to the repository (
git add ignores them).
What do I need to do, to force addition?