Add logo and screenshots to README.md.

README.md

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-# IceCon RCON client
+# ![Logo](img/logo_32.png) IceCon RCON client
 
 *IceCon* is a Q3-compatible RCON client. It can connect to any server that implements RCON over a Q3-compatible network protocol (UDP) and even comes with a nice, straight minimal GUI.
 
 Specifically, this tool has been written for quick administration of modified Modern Warfare 2 ("IW4M") servers. A Windows user could easily set up shortcuts on the desktop that run `icecon.exe -gui <server:port> <password>` which gives you an instant GUI to run commands on your server. Another use case would be scripting on a Linux server by running `icecon -command "<your command here>" <server:port> <password>` to automate specific tasks.
 
+![Screenshot 1](img/screenshot1.png)
+![Screenshot 2](img/screenshot2.png)
+![Screenshot 3](img/screenshot3.png)
+
 ## Download
 
 ### Binaries