adding a simple tag cloud

After having my blog running with harpjs for about a week and having pushed the basic structure to github for everybody to use as they wish (if they wish to…), I found it would be great to organize my tags in a tag cloud rather than showing them in an unhandy list - as the amount of tags used grows, this list view is not useful at all to anybody (unless you are searching the page with the browsers built-in search functionality). I still have the list style active on my archived blog in German if you like to see an example.

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