Additons and new script

new script -
created script which generates download URL's with https://s3.amazonaws.com/Minecraft.Download/versions/versions.json
puts downloaded files in folders based on build type 
puts server and client jar files in separate folders
downloads the .json file needed to run the client in newer minecraft launchers
doesn't use https://mcversions.net/
Developed with python 2.7

Main script -
puts downloaded files in folders based on build type
puts server and client jar files in separate folders
downloads .json file needed to run the client in newer minecraft launchers
still uses https://mcversions.net/
developed with python 2.7