TaylorVar bsxfun improvement: implemented case where size(a) ~= size(b) (replicate along singleton dimensions).
Code formatting, a bit of documentation.
Revert "TaylorVar bsxfun improvement: implemented case where size(a) ~= size(b) (replicate along singleton dimensions)."

This reverts commit 92af48585a07a29e5a5de842464f403228a66a07.
Fix variable name.
Don't test near cos(pitch) = 0.