Update to experimental r13565
Header cleanup: stop using Glib types where they aren't truly needed. Eases GThread deprecation errors.
Added runtime check in SP_-cast macros.
Modified SP_IS_ macros.
Replacement of unnecessary variables.
Merge Object and subclasses. Merging of SP- and C-classes complete.
Merged Item.
Merged FlowX classes.
Added constructors to SP classes.
Replaced all casting macros with glib-independent ones.
Renamed virtual function names.
Added "virtual pad" to - SPFlowdiv - SPFlowtspan - SPFlowpara - SPFlowline - SPFlowregionbreak
moving trunk for module inkscape