Stream-based on-the-fly-download-and-decompress parsing of files

[Per Nordlöw]

Has anybody put together a File-compatible web-download API?

Mu goal is to do have it do

1. stream-based download (via http or https),
2. compress (with gzip or bzip2) and
3. textual parse

of resources available either on the web or locally cached.

An extra bonus would be if the API provided a `std.stdio.File` 
based API so that I can make use of my very speedy D-module zio at

https://github.com/nordlow/phobos-next/blob/331235b048de273a12e711321548782b33d1fb74/src/zio.d