If you read this. Then you know why nerdamer 0.5.6 doesn't exist on npm.
I can't undo the 0.5.6 publish,so I published 0.5.3 instead.
The npm package is identical with the releases except it has package.json.
How to use:
npm install nerdamer
>var nerdamer = require('nerdamer');
>var nerdamer = require('nerdamer/Calculus.js');