[issue27888] Hide pip install/uninstall windows in setup

[Steve Dower]

New submission from Steve Dower:

The console window for pip that appears during setup prevents us from having a truly silent install.

This patch uses the CAQuietExec task from WiX, extracted and checked in directly (the binary blob is omitted from the patch), to run the pip install/uninstall.

It also makes the task non-vital, which will prevent uninstall from failing when pip cannot be removed.

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assignee: steve.dower
components: Windows
files: installer_1.diff
keywords: patch
messages: 273884
nosy: paul.moore, steve.dower, tim.golden, zach.ware
priority: normal
severity: normal
stage: patch review
status: open
title: Hide pip install/uninstall windows in setup
type: behavior
versions: Python 2.7
Added file: https://bugs.python.org/file44257/installer_1.diff

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27888>
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