Previously, traces for each channel could not overlap, meaning that
channels would appear to artificially saturate. There are now two
parameters that determine the location of an LFP channel: plotHeight
and interplotDistance. Thus, plots can remain close together while
keeping a large range.

In order to improve rendering efficiency, the screenBuffer was changed
from a Juce AudioSampleBuffer to an array of GLfloats. Instead of specifying
each individual vertex, OpenGL receives a glVertexPointer. Exact timing
improvements have not been measured, but they should be significant.

The IntanThread can report TTL events on its 6 input channels. This was tested
with an Arduino; input detection is fast and reliable.

The IntanThread also generates its own timestamps, allowing the software to move
toward a framework in which timestamps come from input sources, rather than
from the RecordNode.

Finally, an ArduinoOutput module was added, which allows the software to
communicate with an Arduino via serial output.

This appears to be the source of the inconsistencies, at least on OS X.