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.
Create 1.1.0 release branch.
Update release notes.
Minor adjustments.
add domain for computing in the Dirichlet ring.
add < and > as punctuation to the syntax table.
Print error message instead of invoking debugger.