Changing exports to modules exports for CommonJS

Settings this to just ```exports``` doesn't allow the output .js file to be included as a module in some places. I'm still not 100% sure why, but these links seem to suggest using module.exports over exports. 

http://stackoverflow.com/questions/16383795/difference-between-module-exports-and-exports-in-the-commonjs-module-system
http://stackoverflow.com/questions/7137397/module-exports-vs-exports-in-nodejs

Is there any particular reason why ```exports``` is being used?