Add new feature which is used for Inserting an additional header row after page break

[tuanaphan]

Hi @bpampuch, @liborm85
I implemented this feature for solving issue-531. Could you please have a look at this?
Thank you.

[liborm85]

Thanks. I tried render pdf with this docDefinition:

var additionalRowTxt = 'Cont..';
var tableRows = [];
tableRows.push(['h1', 'h2', 'h3']);

for (var i = 0; i < 590; i++) {
	tableRows.push(['a', 'b', 'c']);
}

var dd = {
	content: [
		{
			table: {
 				headerRows: 1,
 				widths: 'auto',
 				body: tableRows,
 				additionalHeaderRow: function(rowIdx) {
 					return {
 						table: {
 							widths: 'auto',
 							body: [
 								[
 									{
 										text: additionalRowTxt,
 										colSpan: 3
 									},
 									{},
									{}
 								]
 							]
 						}
 					};
 				}
 			}
		}
	]
};

And output on second page is with this wrong content:

[tuanaphan]

Hi @liborm85 , thank for your review. I'll investigate that issue asap. This implementation still works well on my project.

[lbelavoir]

@tuanaphan any chance that you fixed your bugs ?