nengo/nengo — pull request #526 by tcstewar (2014-11-04 00:53:08+00:00)
Title: Removed extra filter on integrator input

Since Connection objects have a default synapse of 0.005s, there's an easy mistake that can be made when defining the input and output passthrough Nodes inside a network. We should always make sure that those input and output passthrough Nodes have ```synapse=None```, since otherwise they'll have an extra lowpass filter added on to their behaviour in addition to whatever the user specifies when connecting them up to something.