# Introduction
  
  This script aims to cache http(s)-downloads
  
  ## How it works
  
  - if a file with the right name and md5 exists, nothing happens
  - if a file with the right name and md5 is in cache, use that
  - if a file with the right name but wrong md5 is in cache, redownload
    download to cache
  - after download, check md5, then copy to target