pypa/pip — pull request #2281 by dstufft (2014-12-28 23:21:44+00:00)
Title: Fix progress bar since Windows doesn't support ANSI escape codes

* Use the colorama module to enable the "clear the line" ANSI escape code on Windows.
* Disable cursor hiding on Windows since Windows terminal doesn't support it nor does colorama.

Fixes #2279 (Verified on a Rackspace VM Running Windows Server 2012 R2).