qualpalr 0.2.1

New features

• qualpalr can now adapt to color deficiencies by transforming the given color
  subspace to simulate protanopia or deuteranopia and then picks colors. This
  has the side-effect of decreasing the distinctness of color palettes when
  colorblind is used, but is more consistent with user input.
• Redesigned the method by which qualpal picks colors. Now initializes a point
  cloud of colors, projects it to DIN99d space, and picks points greedily.
• The introduction to qualpalr vignette has been expanded with a thorough
  description of how qualpalr picks colors.

Bug fixes and minor improvements

• Simulations for tritanopia were dropped since there is no reliable source
  to explain how sRGB ranges should be converted (as there is for deuteranopia
  and protanopia in Vienot et al 1999).
• Added tests using data from Vienot et al 1999 to check that color blind
  simulations work properly.
• Fixed a sampling bug wherein the square root of saturation was taken after
  scaling to the provided range, which generated different ranges than intended.
• Switched to the sobol quasi-random sequence instead of torus.
• Moved from using grDevices::convertColor to formulas from
  Bruce Lindbloom for color conversions,
  since the former function inaccurately converts colors.
• Deprecated ... in qualpal since the function no longer uses an optimizer.