Add new attribute template-dir

Updated definitions in with-existing-pode-slots, print-object, and
pode-equal

Move with-existing-pode-slots to pode.lisp
generate-blog-post-html now works using html-template

modify get-post-title to deal with new format of posts

add imported symbols to package.lisp

remove old code from utils.lisp
add to-do.org;
Finish move to html-template from cl-who