improve rounded rect corners for small nodes; closes #477
improve rounded rect corners for small nodes; closes #477

KonstantinShemyak/cytoscape.js,soomin-maeng/cytoscape.js,soomin-maeng/cytoscape.js,KonstantinShemyak/cytoscape.js,rlugojr/cytoscape.js,rlugojr/cytoscape.js