Fix typos
Fix Safari 6 toString() bug

Merged from https://github.com/jaywilliams/SlickGrid/commit/6b8de2183491408e1d89ed7c7981c24d9f276dc2.
Applied fix to destroy error with JQuery 1.9.
Stop propagation of click event in showMenu

Stop propagation of click event in showMenu as otherwise the column
sorting is triggered
Add functionality to AutoTooltips to optionally work for header cells. Add tests for AutoTooltips.
Add example to demonstrate AutoTooltips.
Add link to AutoTooltips test.
Fix test and clean up.
Clean up file.
Fix #418 - header menu icons not visible in FF when used with sortable columns
Fix #613 - set grid focus when the range is selected