convert tabs to spaces
fix blur for RGBA & RGBX
add detailed test for blur and simple test for sharp
round pixel values
cache hasAlpha for ImagingUnsharpMask
Merge branch 'fix-blur-alpha'
reference gaussian_blur implementation
radius meaning match graphicmagick, pixelmator other software
  and standard deviation from classic gaussian blur algorithm
padding not using anywhere
remove pseudo vcs
rename vars
add effective_scale to all APIs
fix tests and set default effective_scale value for gaussian filter
fix radius == 0
do sum calculation in same loop as maskData calculation
round values with initial .5
this improves performance and readabillity
box blur dummy
first Horizontal Blur for 32
fast realization with moving window.
linear speed against any radius
blur in both directions
allow float radius (without implementation)