Calculator flag

[Samir70]

Each question should have a flag indicating if a calculator can be used.

It might be more efficient to have the getMathQs function check if the flag has been set. If so, leave it alone (either true or false). Otherwise add the property
nonCalc: true

So this becomes the default.

[Samir70]

In the tests, there should be a yellow warning. But since there will be so many, they should only be shown if a showCalc or verbose flag is set.