supporting same languages as highlight.js
Added slide numbers options and the css files updated as well.

the *.min.js didn't chaged yet.
move the slide-number out of the controls to a proper position and little fix to the updating event.
synthetic fix
change SlidesNumber position and start page counter at 0 instead 1
merge slide numbers, adjust code format
slide number changes; config value renamed, added to readme, moved to right side of screen
Merge branch 'feature/more-languages' of https://github.com/haf/reveal.js into dev