Explanation
------------
This is an updated DX10 MLAA demo focusing on improving speed.  The main 
improvements in speed come from simplifying the final edge blending process and 
utilizing the stencil buffer to minimize the number of pixels being processed.  
Together these optimizations bring the cost down to around 2.5ms on my Geforce 
9600M GS and 0.7ms on my Radeon 4850.  Beyond this I suppose it would be possible
to gain some performance by cleaning up the edge detection so we aren't wasting 
time on noise; I could also explore reimplementing this with DirectCompute.

Controls
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1 - 			Disable MLAA
2 - 			Enable MLAA
E -			View base edge detection (only when MLAA is active)
L -			View edge length output (only when MLAA is active)
C -			View final color image (only when MLAA is active)
Mouse -			Control camera view
W/A/S/D -		Control camera movement


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