docs: added man page for pabopto2bsdf
Increased default -n option to 1024 (was 256)
Added search to -f for genrev, gensurf, genworm, bsdf2klems, bsdf2ttree, & pcomb
Created wrapBSDF tool and major overhaul of genBSDF to use it with rfluxmtx
Disabled DEBUG statements in BSDF programs and added progress bars
Added -l option to limit maximum number of RBF lobes for interpolation
Added ability to use Dx, Dy and Dz instead of last 3 function parameters
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