[skip ci] Update README.

Author: stepjam

README.md

@@ -18,7 +18,10 @@ __PyRep is a toolkit for robot learning research, built on top of [CoppeliaSim](
 
 ## Install
 
-In addition to the PyRep API, you will aso need to download the latest version of CoppeliaSim [from the downloads page](http://www.coppeliarobotics.com/downloads.html).
+PyRep requires version **4.1** of CoppeliaSim. Download: 
+- [Ubuntu 16.04](https://www.coppeliarobotics.com/files/CoppeliaSim_Edu_V4_1_0_Ubuntu16_04.tar.xz)
+- [Ubuntu 18.04](https://www.coppeliarobotics.com/files/CoppeliaSim_Edu_V4_1_0_Ubuntu18_04.tar.xz)
+- [Ubuntu 20.04](https://www.coppeliarobotics.com/files/CoppeliaSim_Edu_V4_1_0_Ubuntu20_04.tar.xz)
 
 Once you have downloaded CoppeliaSim, you can pull PyRep from git: