docs: fix logo in readme

replace incorrect svg logo with a simpler text "draw" instead

Author: amoshydra

README.md

@@ -1,9 +1,9 @@
-<p align="center">
-  <img src="http://svgur.com/i/j9.svg" height="50" width="140">
-  <br><br><br>
+<div align="center">
+  <h1>Draw</h1>
+  <p>A web canvas that support pen/touch pressure.</p>
+  <br>
 
   <a href="http://www.amoshydra.com/app/draw">
     <img alt="Draw" src="http://i.imgur.com/esy0Ia8.png" width="90%">
   </a><br>
-  A web canvas that support pen/touch pressure.
-</p>
+</div>