CSS property copying: border-style and box-sizing

Copying the CSS property "border-width" has no effect unless "border-style" is copied, too (at least in Google Chrome). Additionally, the CSS property "box-sizing" affects the layout and should be copied, too.
Merge pull request #61 from Steffen185/patch-2

CSS property copying: border-style and box-sizing
Update README and demo
[Fix #47] Change listView.strategy every time
ListView has strategy property
Set `bottom: 'auto'` when rendering a listView at bottom of caret
[Fix #48] Remove skipNextKeyup