Merge pull request #1 from drywall/master

Slideshow fixes
pull in the latest changes

and fix a few minor styling issues
Merge branch 'master' of https://github.com/INN/navis-slideshows

Conflicts:
	navis-slideshows.php
Merge branch 'master' of https://github.com/INN/navis-slideshows
Smarter handling of random value to really avoid collisions