Minor style update

Use same background color as code block for inlined pre.
Moved tags in post page from top to bottom.
Replaced h3 with h2

Modified templates, use h2 instead of h3 in index, archive, and post page.
Minor tidy up of css to reduce warning message from css validator.
Update link to audio
Add posts about french and emacs
Add description to french-in-emacs post
Update feed URL
Add generated site