only replaced simple min-max code here, the supersampled one still uses
juice setPixel calls. This still doesn’t update the redraws correctly
and has all kinds of bugs but the basic functionality is there and the
cpu load is significantly lower in pretty much all cases.

event toggle buttons had inconsistent border widths

there’s still some fundamental rendering bug, the lines still have
brighter spots in places where it doesn’t quite make sense - maybe its
in the data though - best to make good synthetic data for testing all
the edge cases-  one sample steps in triangle waves, sines etc.

used to miss one sample/pixel, leaving small gaps occasionally

still needs significant performance optimization.
I’ll make a blog post about the details of why this approach should be
reasonable soon.

2do:
- debug, i’m pretty sure this is still missing one sample per pixel
somewhere, and the scaling form sample/histogram density to pixel color
is very hack-y
- performance
- make configurable via sliders

Conflicts:
	.gitignore
	Builds/Linux/Makefile
	Builds/MacOSX/open-ephys.xcodeproj/project.pbxproj
	Builds/VisualStudio2013/open-ephys.vcxproj
	Builds/VisualStudio2013/open-ephys.vcxproj.filters
	Source/CoreServices.h
	Source/Processors/PSTH/PeriStimulusTimeHistogramEditor.cpp

Conflicts:
	Source/Processors/DataThreads/RHD2000Thread.cpp

Fixed the value of bufferIndex, line 173 and following, as previous v…