Allow multiple algebraics in divisors.
Add power series expanders for liouvilian functions.
Fix retraction of 'rootOf' to AlgebraicNumber.
Delete wrong special case for complex roots.
Evaluate Si(0) to 0.
Fix bad pretend in numberOfNormalPoly.
Work around problem with compiling modemaps.
Fix a typo.
Documentation fixes.
Undo accidental change from previous commit.