docs: Change Term 1 V2 sim links to AWS

Users in China were not able to access the Term 1 sim links on Cloudfront, so moved the latest version onto AWS as well.

README.md

@@ -12,9 +12,9 @@ Instructions: Download the zip file, extract it and run the executable file.
 
 Version 2, 2/07/17
 
-[Linux](https://d17h27t6h515a5.cloudfront.net/topher/2017/February/58983558_beta-simulator-linux/beta-simulator-linux.zip)
-[Mac](https://d17h27t6h515a5.cloudfront.net/topher/2017/February/58983385_beta-simulator-mac/beta-simulator-mac.zip)
-[Windows](https://d17h27t6h515a5.cloudfront.net/topher/2017/February/58983318_beta-simulator-windows/beta-simulator-windows.zip)
+[Linux](https://s3-us-west-1.amazonaws.com/udacity-selfdrivingcar/Term1-Sim/term1-simulator-linux.zip)
+[Mac](https://s3-us-west-1.amazonaws.com/udacity-selfdrivingcar/Term1-Sim/term1-simulator-mac.zip)
+[Windows](https://s3-us-west-1.amazonaws.com/udacity-selfdrivingcar/Term1-Sim/term1-simulator-windows.zip)
 
 Version 1, 12/09/16