Rename libgc/ => inkgc/ to reflect difference from Boehm GC
Isolate components of libgc
Switch to top-level glib headers. Thanks to DimStar for patch
* Lots of documentation for the Inkscape::XML namespace * Doxygen fixes for a few files * Garbage-collected allocator for STL containers
shared_ptr -> ptr_shared
replace Util::SharedCStringPtr with the more general Util::shared_ptr<>
moving trunk for module inkscape