Test fixes.
Documentation fixes and improvements.
Fix branches for atan, asin and acos.
Fix build with recent ECL.
Support GMP with sbcl for 32-bit machines.
Fix and clean up WeierstrassPreparation.
Give 0 for coefficients after end of stream.
Better series expanders for elliptic functions.
New test file.
Fix 'belong?' in FS and ES.