message: Add atoms for selection in wireframe rendering
  Previously, no AtomType rendering was presented.
  Fix
diff: @@ -126,11 +126,16 @@ void Wireframe::process(const QtGui::Molecule& molecule,
  auto* lines = new LineStripGeometry;
  lines->identifier().molecule = &molecule;
  lines->identifier().type = Rendering::BondType;
  + // add tiny atom sites for selection
  + auto atoms = new SphereGeometry;
  + atoms->identifier().molecule = &molecule;
  + atoms->identifier().type = Rendering::AtomType;
  auto selectedAtoms = new SphereGeometry;
  selectedAtoms->setOpacity(0.42);
  Vector3ub selectedColor(0, 0, 255);
  geometry->addDrawable(lines);
  + geometry->addDrawable(atoms);
  geometry->addDrawable(selectedAtoms);
  for (Index i = 0; i < molecule.bondCount(); ++i) {
  Core::Bond bond = molecule.bond(i);
  @@ -162,6 +167,10 @@ void Wireframe::process(const QtGui::Molecule& molecule,
  if (interface1.multiBonds || interface2.multiBonds)
  lineWidth *= bond.order();
  lines->addLineStrip(points, colors, lineWidth);
  + // add small spheres to allow the selection tool to work
  + // smaller than this gets ignored
  + atoms->addSphere(pos1, color1, 0.001f, bond.atom1().index());
  + atoms->addSphere(pos2, color2, 0.001f, bond.atom2().index());
  if (bond.atom1().selected())
  selectedAtoms->addSphere(pos1, selectedColor, 0.3f, i);
  if (bond.atom2().selected())
  