Add headings to prague, rio, borneo, sozopol posts
Add h4 and hr styles within content
Add headings to Molyvos post
Remove stray '\' from wordpress export

* Not sure what caused this artefact to appear, seems to always be
after a number.
Make in-post links relative to root
Match index pages to post pages

* Use a whitebackground
* Show less of the blurred background image in the centre
* Re-position blog title
* Make it easier to make the site responsive