Enhanced mutable polygon concept with respect to proxies. Now Boost.Polygon is supported for both reading/writing.

Upgraded ttmath
Added coordinate_cast to support "lexical_cast" of ttmath numbers


[SVN r69054]

libs/geometry

@@ -1 +1 @@
-Subproject commit 90e46544b51aec0382ef360d6a8095efb39ec1f2
+Subproject commit 029ce7c2c49c18bc4c27d7577c7cf4a764019a9b