Add generic SVG badge template

app/views/projects/badges/badge.svg.erb

+<svg xmlns="http://www.w3.org/2000/svg" width="91" height="20">
+  <linearGradient id="b" x2="0" y2="100%">
+    <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
+    <stop offset="1" stop-opacity=".1"/>
+  </linearGradient>
+
+  <mask id="a">
+    <rect width="91" height="20" rx="3" fill="#fff"/>
+  </mask>
+
+  <g mask="url(#a)">
+    <path fill="#555" d="M0 0h37v20H0z"/>
+    <path fill="#4c1" d="M37 0h54v20H37z"/>
+    <path fill="url(#b)" d="M0 0h91v20H0z"/>
+  </g>
+
+  <g fill="#fff" text-anchor="middle">
+    <g font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
+      <text x="18" y="15" fill="#010101" fill-opacity=".3">build</text>
+      <text x="18" y="14">build</text>
+      <text x="63" y="15" fill="#010101" fill-opacity=".3">success</text>
+      <text x="63" y="14">success</text>
+    </g>
+  </g>
+</svg>