title: Why doesn't "go get gopkg.in/..." work while "go get github.com/..." OK?
body: <p>I try to use <code>go get gopkg.in/fatih/pool.v2</code> to install <a href="https://github.com/fatih/pool" rel="nofollow">pool</a> according to <code>Readme.md</code>, but can't success:  </p>
  
  <pre><code>C:\Users\xiaona\Documents\GitHub&gt; go get -v gopkg.in/fatih/pool.v2
  Fetching https://gopkg.in/fatih/pool.v2?go-get=1
  https fetch failed.
  Fetching http://gopkg.in/fatih/pool.v2?go-get=1
  import "gopkg.in/fatih/pool.v2": http/https fetch: Get http://gopkg.in/fatih/poo
  l.v2?go-get=1: dial tcp 107.178.216.236:80: ConnectEx tcp: A connection attempt
  failed because the connected party did not properly respond after a period of ti
  me, or established connection failed because connected host has failed to respon
  d.
  package gopkg.in/fatih/pool.v2: unrecognized import path "gopkg.in/fatih/pool.v2
  "
  </code></pre>
  
  <p>While access <code>107.178.216.236:80</code> is OK in web browser.</p>
  
  <p>I try to use <code>go get github.com/fatih/pool</code>, and it also works OK.</p>
  
  <p>Could anyone give some clues on this issue?</p>
  
  <p>BTW: I use <code>windows powershell</code> and <code>git</code> version is <code>1.9.5</code>.</p>