Fix version specification in apt pkg.install

Changing the install command to use shell=False in the call to
subprocess.Popen caused version specification to stop working due to the
"pkgname=version" string being quoted to prevent shell evaluation of
possible "<" or ">" characters. However, with shell=False this is no
longer a concern, so this no longer needs to be quoted.
Upstart scripts can source a virtualenv
Fix KeyError on minion startup if ext_job_cache option does not exist
use __func_alias__ for chocolatey.list to avoid shadowing built-in type
use raw strings for regexes
iptables mod: add missing space after comma & add parens around tuple for clarity

************* Module salt.modules.iptables
salt/modules/iptables.py:84: [C0324(no-space-after-comma), build_rule] Comma not followed by a space
for ignore in '__id__', 'fun', 'table', 'chain','__env__','__sls__','order':
^^
Updated Saltconf sidebar graphic
Merge pull request #7955 from hulu/chocolatey-fixes

chocolatey module fixes
Merge pull request #7956 from hulu/iptables-fix

iptables mod: add missing space after comma & add parens around tuple
dockerio state: fix typos
Add initial state.show_low_sls
update 0.17.1 release notes
ports state: rm unused imports

************* Module salt.states.ports
salt/states/ports.py:21: [W0611(unused-import), ] Unused import os
salt/states/ports.py:22: [W0611(unused-import), ] Unused import re
dockerio state: more copyedits
Merge pull request #7957 from cvrebert/patch-2

dockerio state: fix typos
Merge pull request #7959 from cvrebert/patch-3

ports state: rm unused imports
Merge pull request #7960 from cvrebert/patch-4

dockerio state: more copyedits
copyedit dockerio module
Merge pull request #7949 from terminalmage/apt-version-spec-fix

Fix version specification in apt pkg.install
Merge pull request #7950 from dlanderson/virtualenv_upstart

Upstart scripts can source a virtualenv