Add Lobste.rs (#576)

* Add Lobste.rs

* Add Lobste.rs reference image

* Ensure Lobste.rs svg matches template

* Add Lobste.rs Android XML

images/svg/lobsters.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="Lobste.rs" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
+fill="#ac130c"/><path d="m420.955 428.064h-308.597v-23.49c9.85-.296 17.913-1.183 24.189-2.688 12.981-3.332 21.501-10.844 23.88-22.831 1.21-6.585 2.27-15.078 2.27-25.533v-199.802c-1.549-21.164-1.89-43.092-23.906-47.935-5.375-1.478-15.951-2.526-24.915-3.13v-21.005h170.627v21.004c-10.16.296-23.504 1.196-29.78 2.688-23.436 6.18-21.125 32.869-21.004 51.509v183.326c-.874 33.903 8.761 51.76 41.162 57.61 23.315-.202 44.078.403 64.947-3.373 21.596-4.435 39.616-18.895 48.378-36.62 4.784-9.85 10.55-33.018 10.55-45.018h22.24z" fill="#fff"/></svg>