query: set a default answer for prompts in scripts

Switch on/off the continue fitting questions.

Syntax:           query <option>

where <option> is yes, no, or on. If on then the continue fitting question in fit, steppar, and error will be asked when the number of trials is exceeded. Also, when the number of trials to find the error is exceeded a question will be asked. For either of the other two options the questions will not be asked but the answer will be assumed to be yes or no depending on the value set. To ensure that fitting continues without any questions being asked use the command

XSPEC12> query yes