3.1.6   *) Case insensitive match on flyout strings
3.2     +) "User-Agent" HTTP header from a predefined list of most commonly used user agents.
           A new user agent is chosen for each account at random. All searches on one account use the same user agent.
           Looks like it solves the problem discussed here https://github.com/sealemar/BingRewards/issues/17

        *) Changed
           BING_QUERY_SUCCESSFULL_RESULT_MARKER = '<div id="results_container">'
           to
           BING_QUERY_SUCCESSFULL_RESULT_MARKER = '<div id="b_content">'