compiles now, but is not fully tested

LFP traces are now only drawn in the space since the last buffer update, this reduced cpu load.
Reverted back to the linedraw method because speed is not an issue any more with this fix.
Currently not issuing full redraws when a user uses the scrollbar, only for clicks and mouse wheel messages.

used the term 'spread' as in the neuralynx software for now

To run this in the future, install astyle (sudo apt-get install astyle),
then enter the following from the top-level project directory:

astyle --options=astyle.options --recursive "./Source/*.cpp" "./Source/*.h"

This will convert tabs to 4 spaces and ensure that brackets are on
their own lines.

With new jucer, windows.h is not only unnecesary, but can cause conflicts with some definitions.
Also, OpenGL.h includes disabled, as it's no longer needed and it, by itself, needs windows.h

The Visualizer class no longer inherents from OpenGLCanvas. In the future,
scrolling will be handled by a Viewport object.

Use the following command to update the copyright year in all files,
starting in the Source/ directory:

find . -type f -print0 | xargs -0
   sed -i 's/Copyright (C) 2012/Copyright (C) 2013/g'

Works like a charm!

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.

updated LfpDisplayCanvas to conform to the updated Visualizer object definition. I simply added an empty method that does nothing to the header file