[ODE] XODE trimesh structure - please vote

[Roel van Dijk]

I choose #1. It's more flexible because you can get to the data using XPath 
queries. File size is not really an issue. I created a simple XODE file of 
2Mb and after gzipping it was just 30Kb. The file had low entropy because of 
all the cutting&pasting but still the compression ratio was really good. 
And because it is only meant as an interchange format I think the advantages 
of XPath and XSLT outweigh the disadvantages of slower parsing and larger 
filesize.