Add setting to allow overriding the history hash generation with a custom function.
Make calculation of toolbar/caption heights more robust. And a small fix for the vimeo workaround (now takes caption height into account as well)
Make sure the slideshow works in IE8+, and make the caption+toolbar appear on click in IE8 as well.
Merge pull request #15 from rayburgemeestre/master

Some fixes that need to be in PhotoSwipe master