Changed polygon concept to implement const/mutable usage

Therefore changed container_access
Added namespace "write" to enable writable containers or ranges
Reimplemented much of Boost.Polygon's polygon_with_hole_data adaption


[SVN r68694]

libs/geometry

@@ -1 +1 @@
-Subproject commit 0871cb8295646b0f14d6c81252ece80ea8e45f17
+Subproject commit da3998874d1961e223be7b603f32f4bbb4cb7efc