Suggest changes

[bkeepers]

To prevent the proliferation of versions (e.g. ver1, ver2…ver8, ver9, etc), a user can suggest changes to an existing songsheet, and there should be mechanisms to make those changes part of the existing songsheet.

MUST:

• A user can edit an existing songsheet and save changes
• The original author can accept suggested changes
• A quorum (3?) of users can accept a specific change, which will update the original songsheet

SHOULD:

• Suggested changes are visible and highlighted when other users view a songsheet with 👍/👎 buttons
• Users can comment on a suggested change