Board Export: Allow more fields when exporting as PNG format#57

It’ll be great if we can add more fields when using the PNG format export. We want the exported Cards to look more like how it is in the Board

We too are looking for a way to get a copy of what the board looks like for a visual represention to stakeholders. They love to see the entire board for a quick glance, but like it to be emailed to them, so we currently have no way of showing them in a one page outlook/overview of the project.