structgen.py has been modified to make the resulting structs.py
more readable: comments should now correctly appear next to the
fields in the generated structs.py
Do not discard the size_t type. size_t was wrongly replaced by uint in ctypes
This caused corruptions when running pyassimp with a 64bits assimp library
While here, updated the max size of some meshes attributes (that leads
to corruptions as well)
While here, update paths to find the assimp headers
Updated structs.py to match assimp 2.0.863 (Ubuntu 12.04). It has been
also tested with libassimp as build from the trunk.