Made sidebar configurable based on product, platform, version properties in configuration file. Also added ability to add series that link together pages.

pages/publishing/gitcommands.md

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+---
+title: Common Git Commands
+permalink: /git_commands/
+tags: [publishing]
+keywords: git, revision control, github, version control
+audience: writers, designers
+last_updated: May 13, 2015
+summary: "These are some sample Git commands."
+---
+{% include linkrefs.html %} 
+
+When you're interacting with Github, it's helpful to know a few basic Git commands...