Compressed images saving 15% filesize

Compressed using smushit and punypng without loss of quality
Abstract away the row positioning.
Merge pull request #572 from blowsie/master

Compressed images saving 15% filesize
Merge branch 'fixex5' of https://github.com/oshea00/SlickGrid into oshea00-fixex5
Fix typos
Merge remote-tracking branch 'upstream/master'