Change Table images, fix image content

Implement Marion's changes to side-by-side images on all projects
Change default image res. to 512 for hires, 320 for normal, 128 for
thumbs
Default top/bot/thumb project images to PCB only, no components.
Update Ecwid store to show PCB only images (lower cost option, bare
board)
Update Ecwid store to bare board PCB as default, image matches product.