First full commit

All required scripts in 'floatbox' and some demonstrations in 'demo'
Adding a readme

I just copy the 'template.php' header info in a README file for the
GitHub repo
OK, shame on me

Just missed the extension
Another try

Not very comfortable with Markdown …
One more time

...
Cleaning all informational comments

I complete the README and all scripts with some more infos in the head
comments.
Some last changes on README
Recast of the demo pages