Another convolution speedup
Another convolution speedup

Will I ever stop noticing needlessly complicated things I did? One does
not need a library to symbolically differentiate in the convolution
step. Everything before the substitution of conformal blocks can be done
analytically.

Signed-off-by: Connor Behan <89f96a099c47edae2e9c5a371cbf43991ac7aa8c@gmail.com>

cbehan/pycftboot