Computes the orientation of a cell
npm install cell-orientationcell-orientation
================
Computes the orientation of a cell, given by a list of integer indices.
``javascript
var orientation = require('cell-orientation')
console.log(orientation([0, 1, 2]))
console.log(orientation([1, 0, 2]))
console.log(orientation([1, 1, 2]))
`
#### require('cell-orienation')(s)
Computes the orientation of the cell
* s is a list of integers
Returns 0 if s has any duplicates (ie is degenerate), otherwise +/- depending on the ordering of s`