this is for #99, now you can mark with 0.5.2, so this patch is just tempolary hack until then,
see https://github.com/jbeder/yaml-cpp/pull/296. I also changed collada2eus_urdfmodel, but
it did not mean I approved this code, we need merge this into collada2eus.cpp, alway to keep
code compact, for future mentenance.
this is for #99, now you can mark with 0.5.2, so this patch is just tempolary hack until then, see https://github.com/jbeder/yaml-cpp/pull/296. I also changed collada2eus_urdfmodel, but it did not mean I approved this code, we need merge this into collada2eus.cpp, alway to keep code compact, for future mentenance.