pure javascript Big Integer module for nodejs

#bi# ##Pure JavaScript Big Integer module for node.js##

Copyright (c) 2012 10iii All Rights Reserved. This module is released under a BSD license.

This module is modified from Tom Wu's jsbn library. Which is also under a BSD license. See

The main change from jsbn is using a buff array instead of hashset member to keep digits, and estimate buff size when create a new BI object during calculating. For detail see