function PdfPrinter(fontDescriptors) {
		this.fontDescriptors = fontDescriptors;
	}
@class Creates an instance of a PdfPrinter which turns document definition into a pdf

@param {Object} fontDescriptors font definition dictionary

@example
var fontDescriptors = {
	Roboto: {
		normal: 'fonts/Roboto-Regular.ttf',
		bold: 'fonts/Roboto-Medium.ttf',
		italics: 'fonts/Roboto-Italic.ttf',
		bolditalics: 'fonts/Roboto-Italic.ttf'
	}
};

var printer = new PdfPrinter(fontDescriptors);