Add logo.svg and update README.md to include logo

README.md

@@ -1,3 +1,5 @@
 # micromail
 
+![](./logo.svg)
+
 Tiny SMTP client for Micropython

logo.svg

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="256" height="256" version="1.1"
+     xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <defs>
+    <linearGradient id="Gradient" x1="0" x2="0" y1="0" y2="1">
+      <stop offset="0%" style="stop-color:#F5C211;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#26A269;stop-opacity:1" />
+    </linearGradient>
+    <filter id="alpha-to-white">
+      <feColorMatrix in="SourceGraphic" type="matrix"
+                     values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0"/>
+    </filter>
+    <g id="child-svg"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" height="16px" width="16px"><path d="M2 5.5V3.9934C2 3.44476 2.45531 3 2.9918 3H21.0082C21.556 3 22 3.44495 22 3.9934V20.0066C22 20.5552 21.5447 21 21.0082 21H2.9918C2.44405 21 2 20.5551 2 20.0066V19H20V7.3L12 14.5L2 5.5ZM0 10H5V12H0V10ZM0 15H8V17H0V15Z" /></svg></g>
+  </defs>
+  <rect
+      width="256"
+      height="256"
+      fill="url(#Gradient)"
+      ry="0"
+      x="0"
+      y="0" />
+  <use xlink:href="#child-svg" filter="url(#alpha-to-white)"
+       transform="matrix(8,0,0,8,64,64)" />
+</svg>