Add role based fields to admin
Add a template tag to handle field visibility

Also wires in plot and tree info
Support scoped udfs on plot detail page
Refactor audits and provide a helper for future fixing of #169
Add short descriptions to audits

Currently space is constrained on the plot detail page so we just show
the audit essentials. We may want to move this sort of logic to a
template at some point
Add method to get deleted tree ids on a given plot
Add recent edits to plot detail page
Turn off color for grunt check when run in fabric
Add eco benefits to plot detail page
Small modifications to use plot.current_tree and work for treeless plots

Also adds tests
Don't show ecobenefits sections if there are no ecobenefits