Remove Spurious Fatal Messages

This release simply suppresses spurious standard error output reporting git fatal errors.

Support for tooling migration and bugfixes

This release adds support for migrating the submodule url for the embedded tools inside of knowledge data repositories.

It also fixes:

• Deploying when not based on a MetaKnowledgeRepository
• A hard dependency on PyPDF2 by making it a soft dependency.
  and other small miscellaneous changes and cleanups.

Initial Open Source Release

With the release of v0.6.0, we open the Knowledge Repository up to the world. We encourage everyone to try it out, give feedback, and contribute code as we work our way toward v1.0.0. With this release, we are confident that the Knowledge Repository is already very useful, and look forward to working with you to make it even better.