Changed __repr__ in BinnedSpikeTrain to support quantities<0.12.4 (#418)
Changed __repr__ in BinnedSpikeTrain to support quantities<0.12.4 (#418)

Co-authored-by: Cristiano Köhler <e5fc16dbdeca3fd57d17131dd4829420ee4c2864@fz-juelich.de>
NeuralEnsemble/elephant,NeuralEnsemble/elephant,INM-6/elephant,mdenker/elephant,INM-6/elephant,INM-6/elephant,mdenker/elephant,NeuralEnsemble/elephant,mdenker/elephant