Cherry picking from branch fix-fragments-in-speakernotes

Change source from reveal.min.js to reveal.js for testing purposes.

Add nextFragment and previousFragment to the API:
Making it possible to call the methods Reveal.nextFragment()
and Reveal.previousFragment() from »outside«.

Update README.md:
Add the new API Methods Reveal.prevFragment() and Reveal.nextFragment()

1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index a56b6e0..a7527a5 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,8 @@ Reveal.up();
 Reveal.down();
 Reveal.prev();
 Reveal.next();
+Reveal.prevFragment();
+Reveal.nextFragment();
 Reveal.toggleOverview();
 
 // Retrieves the previous and current slide elements