teach PyYAML how to serialize OrderedDict (fixes #694)
teach PyYAML how to serialize OrderedDict (fixes #694)

NinjaMSP/crossbar,w1z2g3/crossbar,w1z2g3/crossbar,NinjaMSP/crossbar,w1z2g3/crossbar,w1z2g3/crossbar,w1z2g3/crossbar,w1z2g3/crossbar,NinjaMSP/crossbar,w1z2g3/crossbar