#424 CIF to mCRL2: use new precondition checking framework.
- Best to review per commit.
- Pretty straight-forward step-by-step moving of preconditions to new precondition checker, and then adopting it.
- End-user visible changes:
- The CIF to mCRL2 transformation has improved output in case of precondition violations.
- The CIF to mCRL2 transformer documentation has some fixes for what is supported for unary and binary operators that result in boolean values.
Addresses #424 (closed)