Update README.md
Update README.md
Updates and Fixes

New features and new fixes!
Fixed minDragDistance
Merge pull request #70 from prud/patch-3

minDragDistance setting is not working
Merge branch 'master' into saleslogix

Conflicts:
	snap.js
Null ref check.
Added new snap.js events: close, open, expandLeft, expandRight, enabled, and disabled. Updated README to reflect this change.
Merge branch 'master' into saleslogix