Report versioning

[kynan]

Reports need to support different versions i.e. updating a report should not just overwrite data.

[dgorissen]

Just to break it down:

• updating a report creates a new version. If it makes things easier an explicit version number scheme is not needed, a timestamp should do the trick.
• API should provide a way to list all the versions for a particular report
• UI should call into the above API endpoint to show the status/report history of a waterpoint when clicked

[kynan]

Thankfully we're getting document versioning "for free" with Eve 0.4

[dgorissen]

That would be great! But can the port to Eve be finished on time to allow this all to work by next week? If not, a quick manual implementation is preferred.