GeoJSON defaults to WGS84 if no CRS is defined (according to spec).
Moved extraction of the EPSG integer into utils/EPSG(GeoJSON).

Actually there's only named and linked CRS'es but it makes more sense to have
the functionality in one place.
Changed 'error' crs to match the GeoJSON scheme more closely.
Changed _view/geojson to emit source EPSG.

The EPSG is included only if no simplification was done.
Changed utils/EPSG() to return WGS84 if no CRS is defined.
Changed utils/simplify() to correctly identify WGS84.

The catch/throw blocks have never been my favourite, so good work so far, me!!!
Changed comment to reflect it being a sentence.
Implemented EPSG as a query parameter to _list/export.

The parameter I'll probably never use, but I let it default to the first EPSG
of all geometries. In this case, coordinates are offset only by about 2mm and
that is close enough for me.
The projection definitions are terrible and need review, none the less.
This simplifies some regular expessions with /\d/.
Added optional WKT representation for XML export.

I deliberately exported it to invalid special field because I never ever want
to upload that thing accidentally. Also I consider it experimental so if
someone really wants to use it, that person has to append &include_WKT to the
url by himself.
Enabled re-projected coordinates for WKT geometry.
Removed one closure in uploads.html.
Replaced raw document id with a more useful description.
Set the fillColor to indicate if the document owns its geometry.

Previously the color would only change if the geometry was about to be newly
added.
This prevents documents to cross-link geometries.

I.e. if documents a and b are uploaded and in #reduce, I point a's
GeoJSON_clone to b, I then forbid b from being displayed for geometry
selection.
I ended up linking a to b and vice versa, because when clicking though hundreds
of polygons you can't always keep track.
Employed reference counting for cross-link prevention logic.

As always it was more complicated than that; if multiple links are involved, a
feature may be in-hidden even if other features still link to its geometry.
Hid suggestions for geometries that already link to other geometries.

So if I set A to link to B, then C would not suggest A anymore. And as before,
B would be skipped entirely.
Still unsure if I am on the safe side here.