tweak the .gitignore based on advice from https://github.com/substack/browserify-handbook#node_modules
tweak the .gitignore based on advice from https://github.com/substack/browserify-handbook#node_modules

TryKickoff/kickoff,TryKickoff/kickoff,PatrickEifler/kickoff,fredericksilva/kickoff,PatrickEifler/kickoff,fredericksilva/kickoff