Updating the README to tell people to run the gui.

Author: tarehart

README.md

@@ -5,9 +5,10 @@ Example of a python bot using the RLBot framework
 
 1. Make sure you've installed [Python 3.6 64 bit](https://www.python.org/ftp/python/3.6.5/python-3.6.5-amd64.exe). During installation:
    - Select "Add Python to PATH"
-   - Don't opt out of pip
+   - Make sure pip is included in the installation
 2. Open Rocket League
-3. Double click on run.bat
+3. Double click on run-gui.bat
+4. Click the 'Run' button
 
 ## Changing the bot