TWKB - port CartoDB implementation to mapnik 3.x.x

ref https://github.com/CartoDB/mapnik/blob/2.3.x.cartodb/plugins/input/postgis/postgis_utils.cpp
ref https://github.com/CartoDB/mapnik/tree/2.3.x.cartodb/plugins/input/postgis#23xcartodb

Author: artemp

include/mapnik/wkb.hpp

@@ -60,9 +60,11 @@ class MAPNIK_DECL geometry_utils : private util::noncopyable
 {
 public:
 
-    static mapnik::geometry::geometry<double> from_wkb(const char* wkb,
-                                                       std::size_t size,
-                                                       wkbFormat format = wkbGeneric);
+    static geometry::geometry<double> from_wkb(char const* wkb,
+                                               std::size_t size,
+                                               wkbFormat format = wkbGeneric);
+
+    static geometry::geometry<double> from_twkb(char const* twkb, std::size_t size);
 };
 
 }

src/build.py

@@ -205,6 +205,7 @@ def ldconfig(*args,**kwargs):
     rule.cpp
     save_map.cpp
     wkb.cpp
+    twkb.cpp
     projection.cpp
     proj_transform.cpp
     scale_denominator.cpp