Rename Author to Editor, revise role definitions accordingly.
Trailing whitespace fixes.
Revise Pre-Draft section to clarify its purpose and that a complete ready-to-go proposal is not required at this stage.
Adjust Review section accordingly.
Complete transition from Author to Editor/Contributor.
Merge pull request #8 from Crell/editor-role-revisions

Editor role revisions
There are some changes that need to be made, which Larry agrees with. I'll merge then make them myself.