Expose artifact provider object

• Add method to acquire the artifact provider object to ArtifactCollector

Add instance method to acquire linked listener objects

• Factor out an instance method from the static method used to acquire listener objects attached to ListenerChain
• Add several more options for attaching listener objects to ListenerChain
• Add unit test for ConstructorFactory support
• Apply other unit test tweaks as needed

Add ServiceLoader support for linked listeners

• Add LinkedListener marker interface for listeners that can be linked to the ListenerChain via its service loader
• Add service loader implementation to ListenerChain
• Fix processing of extended listener interface types
• Document new feature in README

Fix log file pathing issue

• Get log file pathing fix by upgrading Java Utils library to version 1.3.3

Redirect README links to open-source repositories

• Replace internal Nordstrom URLs with their new open-source locations
• Upgrade Guava from version 21.0 to version 23.5-jre

Initial open-source release

• Add license
• Switch from Maven deploy plugin to Maven release plugin
• Set open-source artifact group ID
• Upgrade to latest Settings API and Java Utils