added two kernels for image binning and shrinking
work ongoing
flipped arguments order: image size and kernel size in convolution
kernels. Updated tests accordingly
Merge remote branch 'pierre/master'
Plan is able to calculate all blurs & DoG on the GPU
convolutions + kp location are working
Configuration file to build quick & dirty debian packages
work on RGB image & install
typo
Merge remote branch 'pierre/master'
Integrate work from Pierre
Merge remote branch 'pierre/master'
store all DOGs into a single 3D array, stack on images.
Merge remote branch 'pierre/master'

Conflicts:
	openCL/algebra.cl
Comment out kernel under development
integrating the keypoint refinement
added tests for gaussian kernels
Merge remote branch 'pierre/master'

Conflicts:
	openCL/image.cl
try to save memory if possible: allocate less space for gaussian and
recycle.
forgot ...