Update neuroshareapiio.py
Update neuroshareapiio.py

There was a small bug in read_analogsignal function. When only a chunk of a file was read (say from second 5 to second 11), the function would read more than the chunk specified. It would start at second 5, but then read 5+6 seconds of data, instead of only 6 seconds.
INM-6/python-neo,JuliaSprenger/python-neo,Blackfynn/python-neo,guangxingli/python-neo,NeuralEnsemble/python-neo,mgr0dzicki/python-neo,samuelgarcia/python-neo,CINPLA/python-neo,apdavison/python-neo,SummitKwan/python-neo,rgerkin/python-neo,theunissenlab/python-neo