Replace strings by symbols.
Misc cleanups, merge ggreater.lisp into macros.lisp.
Rename PolynomialIdeals to PolynomialIdeal
Add derivatives of Airy functions and Lambert W.
make ATANFLAG into a union type and correct bug (typo) in fs2expxp.
Exhibit failure in RECOP.
Allow application of operators to up to 9 arguments.
Fix problem in remove__denoms.
remove wrong reference to mantepse and exposure of RECOP.
Set 1.1.0 version number.