added support for different outofbounds strategies (zero,value,extendlastpixel)
fixed bug in convolutionY
Merge branch 'master' into outofbounds
fixed wrong variable
computing first and last pixel relative to the threadId
fixed bug in how to compute the last pixel
mixed up left and right edge in gold computation for x
fixed same bugs in y,z for computing last pixel ... one remaining bug in y convolution
fixed bug that ignores pixels that are not part of the actual image instead of writing them back
(this applies in case the image dimensions are not multiplicative of the CUDA convolution window sizes)