Adds governance documents

- GOVERNANCE.md for addressing purpose, roles, responsibilities, and
  conflict resolution
- CONTRIBUTING.md for describing the appropriate contributions to the
  repository

See issue numfocus#75 for context

CONTRIBUTING.md

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+# DISCOVER Handbook Contribution Guide
+
+
+
+NumFOCUS invites the community to make suggestions for improvements to the DISCOVER Cookbook via [pull request (PR)](https://github.com/numfocus/DISCOVER-handbook).
+
+PRs will be evaluated by the NumFOCUS DISC Committee and/or its volunteers.
+
+PRs should be written so as to conform to the [NumFOCUS Contributor Code of Conduct](https://www.numfocus.org/about/code-of-conduct/).
+
+You can also [open an issue](https://github.com/numfocus/DISCOVER-handbook/issues) to suggest an update.
+

GOVERNANCE.md

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+## DISCOVER Handbook Governance Guide
+
+The purpose of this document is to outline the purpose, roles, and decision processes for this repository. The hope is to guide the community on how to accept contributions and maintain the cookbook to the standards of the NumFOCUS Community. This document should not be taken as
+
+# **Open Source Project � Objectives**
+
+* Conference Organizer Enablement
+  - Conference organizers should be able to easily access and use the handbook
+  - Every effort will be made to be responsive to ISV issues
+* Repo Quality
+  - Repo remains in healthy state with good-quality, consistent codebase
+  - Continuous Integration: Using Github Actions we are able to deploy the guide, preview pull-requests, and run quality checks on content.
+
+# **Roles and Definitions**
+* Contributor, Commenter, User
+  - Submitting contributions, creating issues, or using the contents of the repository
+  - Reviewing pull requests
+* Maintainer
+  - Experienced project members who have made numerous contributions
+  - Write control: Approve pull/merge requests (verify submissions vs. acceptance criteria)
+  - Monitor github issues and drive timely resolution
+  - Ensure project information such as the Readme, Contributing docs, wiki, etc., kept up-to-date
+* NumFOCUS DISC Committee
+  - Lead the project in terms of versioning, quality assurance, and overarching objectives
+  - Act as a facilitator in resolving technical and content conflicts
+  - Designate new approvers
+* NumFOCUS Administration Board
+  - Approve member elections to DISC Committee
+  - Provide oversight for committee
+
+
+# **Acceptance Criteria and Process**
+  - All source code and document copyrights will be owned by Contributer
+  - Submissions of source code and documents implies a perpetual MIT license to the DISCOVER community
+  - Contributions are via pull requests
+    - Maintainers will assign approvers to contributor pull requests
+    - Approvers can self-assign their reviewers
+    - For complex or invasive contributions, Maintainers may request approval from specific reviewers
+    - At least one review approval is required to complete a pull request
+    - The goal is to be responsive to contributors while ensuring acceptance criteria is met and to facilitate their submissions
+    - Approval is dependent upon adherence to the guidelines in [CONTRIBUTING.md](CONTRIBUTING.md), and alignment with
+repository goals of maintainability, completeness, and quality
+    - Conflicts or questions will ultimately be resolved by the NumFOCUS DISC Committee