Slightly altered the layout of the SpikeDisplayEditor, also I changed the waveform line width from 1 to 2 pixels

modified the SpikeDisplayEditor and SpikeDisplayCanvas objects to make use of the new setParameter(int,int,int,float) method defined in the Visualizer class. Additionally the SpikeDisplayEditor now responds to Pan/Zoom and clear commands. However Pan/Zoom only work on the first plot. Additionally on the "all" button for the  sub-channel selector buttons now responds intelligently. ie. if you enable all it turns on, if you disable one it turns off.

Implemented basic panning and zooming for the stereotrode plots.  I was unable to hook up events from the SpikeDisplayEditor to the SpikeDisplayCanvas correct... so clicking in the 4 quadrants of the canvas has the effect of zooming/panning in/out

moved around the SpikeDisplayEditor GUI elements a bit, removed the Save button and added selector buttons for each subchannel.

Began work on the SpikeDisplayEditor. Buttons were added to zoom, pan, clear, and save the plots. Currently only the clear button works
Additionally I added a bunch of constants to the SpikeDisplayNode.h which will be used to define messages between the editor and the Canvas

The SpikeDisplayNode object isn't working properly. Queueing of spikes there appeared to be what was causing the problem.

I need to consider an alternative way of handling the SpikeObjects. In the past I've used a circular buffer but that has
problems with having a set size. I can use an stl::queue but queues are not thread safe, which is something that we
definitely need.

Anyway the plots show up and dance when the viewer is turned on.  I still need to implement a Stereotrode plot and then the
tetrode plot. I'll probably derive them from the ElectrodePlot base class instead of creating a base classs from which all
three plot types are derived from.

Finally I need to get a better handle on the setup of the OpenGLCanvas and how its sized.  How the "Magical" scroll bars work
and how to auto place the plots.

Do we force all the plots to be of the same type? Or do we mix in Electrode Plots with Tetrode Plots?  If so how do we orient them all?

Initial commit of the files needed for the SpikeDisplay. I created an SpikeObject file as well. This is how spikes will be represented in the SpikeDisplayNode and used by the SpikeViewer