updated the generateSimulatedSpike to appropriately scale the waveforms. Instead of simply shifting the entire waveform the baseline is leftalone and the peak is scaled. Additionally the spikes are now distributed exponentially in amplitude space rather than uniformly

A preliminary version of the ProjectionAxes that renders projection points using a texture instead of drawing each point. This should allow the plots to translate around the page without problem.  Additionally the plot can be flagged to regenerate the texture from scratch using a circular buffer of accumulated amplitudes. This hasn't been tested yet.  Additionally this code is very alpha and needs to be cleaned up and could break at any time.

Additionally I fixed a minor bug that was preventing projections from getting plotted for tetrodes

this is _the_ commit before I start integrating the texture based rendering for projection plots

switched SpikeDisplayCanvas to Stereotrode plots from TetrodePlots as I haven't figured out why the tetrodeplots aren't displaying the projection points yet

Started integrating the TetrodePlot class. Oddly the projection plots aren't working although they were working in the stereotrode class, I'll have to figure that one out

updated spike plotting to show points in the projection plots, points don't persists and I haven't been able to disable anti-aliasing on the mac so those things still need to be done

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 checkin of the SpikePlotting directory. This will contain all of the objects used  for drawing individual spikep plots

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