Version 1 of #439

The following commits should address this:

• 3af3966 Clarify in title that someone revised an idea (rathen than originated idea)
• 6c70cea Underneath idea, indicate that someone revised an idea (rather than submitted it)
• d20d386 Explain that users can revise each others’ ideas
• c5748e3 Turn ‘revise’ link into ‘revise their idea’ when it’s someone else’s idea
• e0fbd41 List user under each revision in version history