instructions when available.

float data.

them use SIMD instructions.  Also changed the default interpolation method for
pyramid_up to bilinear interpolation and removed the levels option.

recent changes to the core solver.  Also added support for the nuclear norm
regularization and cache refinement options.

option to zero pad the borders of the output to it's easier to filter.

the separation oracle once the cache based refinement starts.

the entire image.  Also added a bunch of unit tests to cover the new behavior of
the filtering functions.

input to define the non-border area.

use nuclear norm regularization in their parameter estimation.

can't use the add_to or use_abs options with color images.