incorporated new kitemarks from Adrian

Couple of bits that could do with review by @jolankester and @beckyjennings.

One is that the replacement pngs are a lot smaller than the original badges. I've handled that by adjusting spacing where they were used on the about page. I think we'll need a larger version for the certificate page, but currently the badge isn't appearing anyway.

Second thing is that there's no badge for 'you haven't attained any level yet', for the tab in the questionnaire view. I've addressed this by making the tab itself blank, but I don't know whether that works.

Please get in touch with Adrian directly for extra assets you need around these.