update CSS to match new MakeMyIsland colours
replace make-my-island logo with new version
add buttons for locations in Maldives (part of #863)

The underlying problem here is the target area is currently too small
for the geocoder to be useful: we're not really getting anything useful
back from the OSM geocoder within Fonadhoo. So I've manually located
the three villages on the island and added them as buttons... this is
really for interface because although one button for the whole island
is probably OK, basically it was just replicating the <h1> and wasn't
obvious (or sensible) that the user needed to hit a button at all..

If the project expands to more areas of the Maldives we can either take
those out or revert to the geocoder.

The same too-small-area logic makes the "locate me automatically" a
bit silly, so that's been dropped from the front page too.
Add MakeMyIsland cobrand module (really for title)

Perhaps useful as we might be adding more stuff if the project expands,
e.g., geocoder disambiguation.
add UNDP logo to makemyisland cobrand, as per #863
change UNDP logo to top right as per client's instructions
use relative not absolute refs in layout SCSS
add explicit BASE_URL to URLs in nav and header, works in admin
Report moderation

    - redaction marked with [...]
    - of report and comments
    - stores original data
    - uses a single form, on the report/_main view
    - requires additional permissions (user_body_permissions)
    - Hide report functionality
    - Moderation notification/contact form
    - Moderation writes to admin_log
Tests for moderation
Move bromley from report hiding to moderation

The feature to hide reports is still enabled, as it is used by other
`users_can_hide` bodies.  As we want to roll out moderation to Bromley,
in this commit we hide the functionality *only* for Bromley.  Of course
if we migrate those other users to this moderation method, then we will
need to make equivalent change to general template, and remove the
functionality from Report.pm.
refactor repeat code into get_email_template