Addition of type Tvector

This release adds initial support for Tvector type and fixes errors in make-lexer

Missing import in make-ersatz-lexer

This release fixes an issue with a missing import of (chicken format)

Support for CHICKEN 5

This release includes changes for compatibility with CHICKEN 5.

More robust toint filter

This release includes changes to ensure that toint processes Tint values as well as Tfloat.

Added debug parameter

Added parameter debug which enables debug prints in eval-stmt.