Bug#1022720: RFP: golang-github-cavaliergophier-grab-dev -- Go package for downloading files from the internet

[Sebastien Delafond <seb@debian.org>]

Package: wnpp
Severity: wishlist

* Package name    : golang-github-cavaliergophier-grab-dev
  Version         : 3.0.1
  Upstream Author : Ryan Armstrong
* URL             : https://github.com/cavaliergopher/grab
* License         : BSD-3
  Programming Lang: go
  Description     : Go package for downloading files from the internet

Grab is a Go package for downloading files from the internet with the
following rad features:

  - monitor download progress concurrently
  - auto-resume incomplete downloads
  - guess filename from content header or URL path
  - safely cancel downloads using context.Context
  - validate downloads using checksums
  - download batches of files concurrently
  - apply rate limiters

This is a required dependency for aptly 1.5.