Triage workflow: update waterpoint and request together

Previously, waterpoint updates were applied immediately when hitting
"apply" for each attribute and the request was only updated when
hitting "Update report". This is changed to checkboxes for attributes
to apply when the report is updated. The reported value is also no
longer editable.
Merge pull request #82 from taarifa/triage-workflow

Triage workflow: update waterpoint and request together