Add Microsoft (#262) (#289)

- Added the Microsoft Logo
- Updated README.md
- Added PNG to Reference
- Updated index.md

images/svg/microsoft.svg

@@ -0,0 +1,21 @@
+<svg
+xmlns="http://www.w3.org/2000/svg"
+aria-label="Microsoft" role="img"
+viewBox="0 0 512 512">
+<rect
+width="512" height="512"
+rx="15%"
+fill="#fff"/>
+<rect
+x="75" y ="75" width="171" height="171"
+fill="#f25022"/>
+<rect
+x="266" y ="75" width="171" height="171"
+fill="#7fba00"/>
+<rect
+x="75" y ="266" width="171" height="171"
+fill="#00a4ef"/>
+<rect
+x="266" y ="266" width="171" height="171"
+fill="#ffb900"/>
+</svg>