Export unpack__poly().
Comment fixes.
expps: new package for manipulation of exponential power series
toString for floats and Catalan numbers
Support build in directories with long names.
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.