New features after 3 years!

- Removed the code that rounded the position to 0 or 5 (it failed in old
browsers, but we no longer support old browsers :P)
- NEW FEATURE: Allow users to select the box target size by making use
of the HTML data- attributes.
- correct some class naming convention so it follows the same as old the
elements ("ic") instead of a different one ("ci")
- change the single example to display the changes (notice the horse
picture and the cathedral always have the same box size)
Users can choose what part of the picture displays

- If the user specifies the the data- attributes posx and posy, he/she
will be specifying the position of the image within the box.
- Modified the example with multiple clouds for display