Try to formalize feature release process

[asfimport]

Reporter: Micah Kornfield / @emkornfield
Assignee: Micah Kornfield / @emkornfield

PRs and other links:

• GitHub Pull Request #258
• GitHub Pull Request #61

_{Note: This issue was originally created as PARQUET-2489. Please see the migration documentation for further details.}

[emkornfield]

Addressed by pull requests linked and merged.