Any way to download image directories within script?

I have been using 

getNewestVersion = loadstring(httpGet("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/version.lua"))
latestVersion = getNewestVersion()
currentVersion = dofile(localPath .."version.lua")
if currentVersion == latestVersion then
   toast ("You are running the most current version!")
else
   httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/version.lua", localPath .."version.lua")
   httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/PalPowerUp.lua", localPath .."PalPowerUp.lua")
   scriptExit("You have Updated PalPowerUp bot!")
end
The above works well for single .lua scripts. However if I add any images to the image directory users would still need to manually install those images.

I am using anoter .lua file that just batch downloads images 1 by 1 from github like:

httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/images/image1.png", localPath .."images/image1.png")
httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/images/image2.png", localPath .."images/image2.png")
httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/images/image3.png", localPath .."images/image3.png")
httpDownload("https://raw.githubusercontent.com/Paladiex/PalPowerUp/master/images/image4.png", localPath .."images/image4.png")

Does anyone know of a more efficient way to download new directories automatically?