Get KML export working again under 2.18;
KML export multipolygons as MultiGeometry;
KML attribute export as ExtendedData;
Customizable KML description HTML;
Fix geometry_export_to_csv non-ASCII
character errors;
Fix attribute join mangling large integers;
Dialog layer selection boxes use layer order from TOC;
Invalid rightzipcode assignment in street geocode;
Revert street geocoder to simpler street name normalizer;
Accept LongLong and ULongLong as spatial join numeric types under Windoze
64-bit;
Spatial join (and most tools) include joined fields;
layer.fields() allows removal of quirky layer.dataProvider.fields();
Change merge attribute handling to convert different attribute types with same
name to string.
