Made some default images

I just added some code to put in a default image if there is no video or lead image associated with a post – so far they are only on the front page but I will change the code for the archive pages tomorrow. This means that I can write from my iPod touch without supplying an image and it still looks good on the front page. As I said, tomorrow I will do the single posts and the categories. This post was from my iPod :)