Fuse 6.1 introduction + some amendments

* Addition of fuse introduction
* extended readme.md and 
* altered Gruntfile.js to listen on all local addresses (useful when sharing the presentation on a local N/W),  
* Also moved examples to content.
Sure makes sense - maybe we can just put this in the readme instead then? Better to document it. With the change above as well it means we can drop any special changes to this file which makes merging from the upstream reveal.js project easier.