Fix previous commit.
Trap errors in 'numericIfCan'.
Fix 'random()' in SingleInteger.
Documentation and whitespace cleanups.
Add modular polynomial gcd over algebraic extensions.
Add numeric Liouvilian functions.
Export modpreduction, add little speedup.
Change derivatives of fresnelC and fresnelS.
Add complex ellipticF and ellipticE.
Add missing jacobiZeta.