Squashed 'reveal.js/' changes from 784fa9d..380264a

380264a merge in notes improvement
fd7d09f find correct path to open html file from the notes.js path
cf8708f adjust copyright years
8a2f146 remove experimental tileflip transition, reduce max size of media content to 95% to account for slide padding
6b0fff3 enable backgrounds images when printing to pdf (closes #271)
11fc906 helper method for retrieving slide based on index (closes #293)
080fb3c disable zoom plugin while in overview mode
c21e6bb fix vertical centering of slide in ios chrome (closes #289)
2629be6 trailing ws
9b83013 fix error with removal of control button and progress bar event listeners (closes #323)
d182235 code cosmetics
abf9ddb Merge pull request #322 from commadelimited/deactivate-nav-during-pause
f45d948 describing new presentation sizing logic in readme
98a9908 fix word breaks in headers (closes #321)
c50ae08 remove extra padding in stacks, add api method to retrieve curren scale (#310)
723bd1c reduce width of single-page fallback slides
f0b93d8 Only allowing 'unpause' keyboard events while paused
1b01a74 change default maxScale to 1.0 (#310)
f7a0cf7 add config vars for #310 to readme
9660cdb add min/max scale settings (#310)
1ca8306 rename padding config option to margin, better mobile support for scaled presentations (#310)
a20d3b6 fix layering issue of anchors in ff with page transition (closes #274)
312eafe feature detect zoom with fallback on transform, allow percent units for deck width/height (#310)
d1c7452 updated to v2.3, initial implementation of uniformly scaled presentations (#310)

git-subtree-dir: reveal.js
git-subtree-split: 380264afc8468544d82f3e50115cef249f08fff5
Merge commit 'eaefa926eb32d3fdd73b29567d136af70a905d20' into gh-pages