performance improvement: avoid calling getDataItem multiple times for same row
more performance improvement
minimize getDataLength() calls
Merge remote-tracking branch 'upstream/master'
back out for loop changes
Add index.html to the examples folder.
Merge pull request #639 from RandScullard/master

Add index.html to the examples folder
Merge pull request #638 from kzhdev/master

Performance Improvement: Avoid calling getDataItem multiple time for the same row.
Remove the use of jQueryUI effect and move the invalid cell animation into CSS.
Maintain the reference to the right "self" object in DataView.