adding NumberFormat for column data

This will add NumberFormat functionality to the plugin.
https://developers.google.com/chart/interactive/docs/reference#numberformatter

format: is the object passed in when instantiating google.visualization.NumberFormat()

columnNum: is the second param in call ( so in this case columnNum: 1)
formatter.format(data, 1);

how to implement (example settings from controller):

var chart1 = {};
chart1.type = "ColumnChart";
chart1.numberFormat = {
        cols : [
            {columnNum: 0, format: {prefix: '$', negativeColor: 'red', negativeParens: true} },
            {columnNum: 1, format: {prefix: '$'} }
        ]
    };