Add an svg version of the logo

data/mat2.svg

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+<svg xmlns="http://www.w3.org/2000/svg" version="1.0">
+  <g
+     fill="#27628a"
+     stroke="none">
+    <path
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+  </g>
+  <g
+     fill="#7fcae7"
+     stroke="none">
+    <path
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+  </g>
+  <g
+     fill="#c0dede"
+     stroke="none">
+    <path
+       d="M0 1625 l0 -1625 3000 0 3000 0 0 1625 0 1625 -3000 0 -3000 0 0 -1625z" />
+  </g>
+  <g
+     fill="#ffffff"
+     stroke="none">
+    <path
+       d="M 881.01695,3249.9206 C 1286.0459,3091.4742 1546.5278,3035.4925 1889,2924 c 129.95,-482.4131 173.4726,-686.2614 331,-1262 132.796,95.3371 216.2935,142.9991 359,242 116.2556,-360.389 199.5642,-636.2515 320,-1025 108.0281,-100.84978 136.3812,-131.67871 296,-299 10,0 254,309 487,616 83.6789,470.193 92.832,516.3155 215,1032 422.9371,260.0129 459.4089,278.2641 878,528 0,69.3333 0,138.6667 0,208 253.7343,134.9322 263.2776,139.2776 570,286 H 3107 c -2226,0 -2219.49894,-0.1145 -2225.98305,-0.079 z" />
+  </g>
+</svg>