Removing global flag for replacing whitespaces
Add generated css and js to gitignore

I found it nice to ignore these files, they are automatically generated anyway (i.e. reveal.min.js always has the date of minify-ing, which I don't want to commit all the time). Should just track the source unless there is a good reason to hand-curate these versions.
optimization, only declare background creation method once
start work on video backgrounds #751
add getTotalSlides #858
test for #858
Merge branch 'dev' of github.com:ht push origin akimel/reveal.js into dev
Mark xhr.status=0 as successful
Mark xhr.status=0 as successful
use flexbox for vertically centered printing #862
revamped and greatly simplified the layout of .slides
video background playback
only use zoom to scale content in webkit
Merge pull request #682 from tentacode/patch-1

Indentation issue when using code in a markdown slide
next release will be 3.0.0
Merge branch 'patch-1' of https://github.com/jamestwebber/reveal.js into dev
stop tracking minified files #783
Merge branch 'xhr-local' of https://github.com/malyw/reveal.js into dev
code format tweak
better transition names, fix background images in vertical slides