Strips HTML tags and adds feature for "more" text

**Two fixes:**

FIX: Updated wordpress.php to include posts that used the "more" text feature. In the previous revision, if the blog owner used the "more" text feature, it would only import the text before the "more text", but would fail to import the whole post.

FIX: Strips all HTML tags out.  While a pain that it strips every HTML tag, it is still much easier to go back and markdownify plain text than it is the clean up HTML tags and add markdown.