Create a single fragment event per fragment-index

For backward-compatibility, add a new 'fragments' property to the
fragmentshown and fragmenthidden events. The 'fragment' property still
returns the first fragment.
pdf hacks
background image tweaks
pdf print tweak
default lineheight #512
Merge remote-tracking branch 'upstream/master'
Updated README.md

Added "touch" config property
Merge pull request #517 from punchFaceChamp/patch-2

Updated README.md
additional background test
Merge branch 'fix-notes-after-pr-435' of https://github.com/ericweikl/reveal.js
test > examples
add barebones example
update url to setup instructions (closes #520)
update changelog links
Merge remote-tracking branch 'upstream/master'
Added leap.min.js and comments.
Added gestures

Left, right, up, and down gestures.
Optional invert for gestures.
Updates to leap.js and index.html

Added timing code to limit gesture calls.
Added gesture to access the overview.
index.html includes the leap plugin
Minor updates
Changed invert to naturalSwipe
Removed invert rule from index.html
Ensured that left/right swipes only work with 1 hand present
modified:   index.html
modified:   plugin/leap/leap.js
Removed timing code.
When used correctly, the 1/2 second delay is uncessary and may yield undesireable results.
modified:   plugin/leap/leap.js