TdtIO: Improved python 3 compatability and small bug fixes#329

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corneyl wants to merge 2 commits intoNeuralEnsemble:masterfrom

Commits on May 10, 2017

Changed itertools.izip import to make it compattible with python 3.
corneyl
committed
Changed AnalogSignal name to decoded string, removed unsupported channel_index parameter.
corneyl
committed