SD.Stack

[lpatiny]

Spectra stack (same principle as image-js Stack)

SD.Stack.fromJcamp([url] or [jcamp]) should return in a Promise a SD.Stack
SD.Stack.fromBruker([zip url] or zip that contains many spectra)

A SD.Stack extends Array (like with image-js Stack) so it behave like an array.
However we will be able to add some specific methods in order to make comparison of spectra.

So we should be able to do something like

SD.Stack.fromJcamp([urls]).then(function(stack) {
  var peaks=stack.map( spectra) => spectra.peakPicking() );
});