Using <div><base target="_blank"></div> causes loss of other <head> elements

I had a problem with the <base...> head option which you fixed in #16.

Unfortunately, when I use the recommended `<div><base target="_blank"></div>` element, other head elements such as "title" or "link" are lost and no longer included in the output. Seems as if the `div/base` elements prematurely force the end of the head element.

This happens regardless of where I put the `div/base` element.