Add back 2 patches for histogram and overlayframe that are working correctly and mistakenly reverted
revert mods made for HDR for out-of-range values greater than (0 - 1.0f)
Credit Andrea/Andrew - allow for out-of-range values for HDR video; so no clipping using RGBA-float and X11 driver in Histogram and Color3way plugins
rework overlayframe for parallel build, use -Ofast on frame xfers and plugins
initial commit