(chocolatey#970) Spike nexus installation guide

As part of the new organizational deployment guide, we need to
document a supported and tested repository solution. For this we
will use Sonatype Nexus Repository OSS edition.

input/en-us/guides/organizations/new-org-guide.md

@@ -0,0 +1,19 @@
+## Overview
+
+### Pre-Requistes
+
+### Install Sonatype Nexus
+
+### Configuring Sonatype Nexus
+
+#### Removing Default Repositories
+
+#### Configure Hosted Repositories
+
+#### Configure Raw (Generic) Repositories
+
+#### Authentication Considerations
+
+#### Package Clean-up Policies
+
+#### Package Storage Requirements (Blob Stores)