Refer ORIG-README.md on actual documentation.

Forked from shortid.

Reason for fork:

1. have a shorter id length (6 instead of 9 as of 16-Aug-2018)

to achieve this we have to edit lib\build.js

// Ignore all milliseconds before a certain time to reduce the size of the date entropy without sacrificing uniqueness. // This number should be updated every year or so to keep the generated id short. // To regenerate new Date() - 0 and bump the version. Always bump the version! var REDUCE_TIME = 1459707606518;

1. setting REDUCE_TIME to a recent time
2. setting version to 1. Not bumping, as it's forked.