add a .gitignore file

[mwawrusch]

Awesome module, really love it and use it extensively. One thing you might want to consider is adding a .gitignore file to avoid pushing node_modules to git.

Typical content would look like:

node_modules tmp .DS_Store npm-debug.log

Also you might want to remove the node_modules from git.

[agrueneberg]

Glad you like it! You're right: it doesn't make a lot of sense to keep the dev dependencies in the repo. I removed them, too.