Bug fix, this bug isn't too obvious, no point into trying to display keywords on a page that doesn't exist.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@785703 b8457f37-d9ea-0310-8a92-e5e31aec5664
Small bug fix.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@785704 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed non obvious bug, WP Error Log picked it up. Called a method on a null object.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@786158 b8457f37-d9ea-0310-8a92-e5e31aec5664
Somehow fixing some bugs removed description, I've added it back.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@786167 b8457f37-d9ea-0310-8a92-e5e31aec5664
Noticed bugs with projects using sessions. So I've cleaned that up.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@787976 b8457f37-d9ea-0310-8a92-e5e31aec5664
Able to extract keywords from more html tags on the page. Now you can extract keywords from li, strong, em, th, span, dt, dd and a tags.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@788443 b8457f37-d9ea-0310-8a92-e5e31aec5664
I've noticed in older templates that the post id is empty. Clever Keywords needs the post id so that it can accurately add the relavent description and keywords to the page. Since it can't always do this, now we find the post id by slug.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@788518 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added the ability to add dynamic hidden headings which contain the page's keywords to a widget. This basically boosts your SEO score and doesn't affect how the site looks at all.

git-svn-id: https://plugins.svn.wordpress.org/clever-seo-keywords/trunk@789019 b8457f37-d9ea-0310-8a92-e5e31aec5664