Update index.html
current page test added, a bit more details on the column demo page
Merge branch 'gh-pages' of https://github.com/MoonStorm/trNgGrid
added page number test case, google prettify added
generate items
demo fix
added more samples in the customization section
navigatetopage changed, the event is useless in the method call
  navigatetopage changed, the event is useless in the method call