Move implementation of 'first(x, n)' from STAGG to URAGG; specialize in List
Move implementation of '#' under condition in URAGG
Speed up polynomial evaluation
Add own implementation of 'atan' and 'atanh'
Avoid unsound use of Complex
Fix gcd in Factored
minor documentation fixes
Fix a thinko
reduce Lisp calls in Domain List by inlining functions
move implementation from IndexedList to List