Move all HTML in create_page to separate template files

[sc0ttj]

Create

./templates/site_meta.html
./templates/site_header.html
./templates/post_header.html
./templates/post_body.html
./templates/post_prev_next.html
./templates/post_footer.html
./templates/site_footer.html
... etc

Containing stuff like:

site_footer.html:

<div class="footer">
$blog_title
</div>

...then just cat the HTML into vars in the various create_page funcs..

for mustache, see https://github.com/jwerle/mush

[sc0ttj]

See branch https://github.com/sc0ttj/mdsh/tree/mustache-templating-1