seo_friend 6.x-1.0-beta4

1) bug fix so validation only happens upon node form save (not preview or delete)

2) change the seochecklist module name due to new release

3) add nodeapi hook to handle pathauto checkbox tracking if node_save is called
directly rather than editing node through node edit form

4) check that nodeword functions exist prior to calling them

5) add SEO Info tab on node page / css changes for SEO Info block