SOL Spike Order Learning Rule

Relative order learning in spiking neural networks for pattern recognition. A paper from Zhejiang and Fudan Universities.

Seems small and fast for training.

@Ed_Pell I moved this from #htm-theory:neuroscience because I want to keep those topics strictly about neuroscience. This is more about computing. Also, please edit your post and add the name of the paper so it gets picked up in searches.