Fix retraction of 'rootOf' to AlgebraicNumber.
Delete wrong special case for complex roots.
Fix bad pretend in numberOfNormalPoly.
Avoid error when printing error message.
Fix a problem with nested iteration.
Better handling of trigonometric integrals.
Fix wrong selection for 'convert'.
Add jet bundle framework.
Fix problem with crashes during tracing.
Add Holt-Rees improvement to meatAxe.