Update README.md

Replaced random and useless topology with complete symbol overview

README.md

@@ -5,8 +5,8 @@ Free 2D symbols for computer network diagrams.
 Simple. I wanted modern, crisp, pixel-perfect, printable, manufacturer independent symbols for computer-network topology that does not look like they were made in the 80s. 
 
 ## Want to change color?
-`sed -e "s/rgb(77,77,77)/rgb(45,103,185)/" c_shield_gray.svg >c_shield_blue.svg`
+`sed -e "s/rgb(77,77,77)/rgb(45,103,185)/" c_shield_gray.svg > c_shield_blue.svg`
 
-## Sample topology
-![alt text](https://github.com/ecceman/affinity/blob/master/topology_sample.png)
+## Symbol overview
+![alt text](https://github.com/ecceman/affinity/blob/master/affinity_index.png)