Update README.md
Update README.md
Fixed detection of Firefox for mobile.
Better fix for FF mobile
Detect android without version

FF on android doesn't set version number.
NodeList.ccs() now accepts hyphens in css properties.
Removed observable connect method. addListener and removeListener has
been removed (use on,off instead).
Fixed Cu.format. Also Cu.dom now sends parameters to Cu.format so that
both micro-templating and creation of the document fragment can be done
with lesser code.