Don't write out bugs letters if we asked for columns that don't exist.
Update the Tutorial.
Add note.
Update README output.
Add builtin set_vector_index that works on generic objects.
Add builtin new_vector.
Add builtin for get_vector_index.
Add builtin vector_size.
Fix vector_size.
Add builtins for handling pair<object_ref,object_ref>
Add list_from_vector to Prelude.
Add new functions for Vector<object_ref> to Prelude.
Make c_pair work on pairs.
Update findBinary.
Fix findBinary.
Simplify code for findBinary and other find*.
Remove unused M0_Op from smodel/operations.H.
Update findBinary to take the token and pass it to get_modifiable_index.
Check that we aren't returning a lambda2 from context::evaluate_expression_( )
Instead of asserting if we evaluate a lambda, through an exception.