Proper 100% size...

Full height and width to ensure that the div fills the whole element.

Otherwise, it was possible that percentual heights were not propagated correctly as the saw-div did not have the same height as the resize-aware element.
Also fixed the CSS style which refered to the element saw but was probably meant for the div with the id "saw"

With 100% size

Merge pull request #5 from mlisook/bumpto20

add version info to readme