updates to solve math and question challenges

[jscanzoni]

No description provided.

[Hainish]

Nice, thanks for this! Can you give a few examples of forms this works for? Also would be good to add tests.

[jscanzoni]

Here are the three scenarios I was looking to solve:

https://www.flsenate.gov/Senators/s10

    - math:
        - name: math_qna
          question_selector: "label[for='math-test']"
          answer_selector: "#math-test"

http://www.mnsenaterepublicans.com/our-senators/gary-dahms/

    - math:
        - name: mathquestion
          selector: "Just to prove you are a human, please solve the equation: "
          question_selector: "#captcha_row"
          answer_selector: "#contact_form input[name='captcha']"

http://www.lrc.ky.gov/Messages/H026.aspx

    - question:
        - name: qna
          question_selector: "#LabelQ"
          answer_selector: "#TextBoxQ"
          pairs:
            - q: "Is ice hot or cold?"
              a: "cold"
            - q: "Is fire hot or cold?"
              a: "hot"
            - q: "Is water wet or dry?"
              a: "wet"