title: How to pip install from github....powershell gives error Cannot find command 'git'?
body: <p>I'm trying install psycopg2 into my virtualenv. I've tried pip I've tried easy_install nothing is working... installing from pip is the more desirable choice but it has to be done through nwcell's github package  <a href="https://github.com/nwcell/psycopg2-windows" rel="noreferrer">https://github.com/nwcell/psycopg2-windows</a> heres the command I've been using:</p>
  
  <pre><code>pip install git+https://github.com/nwcell/psycopg2-windows.git@win64-py34#egg=psycopg2
  </code></pre>