update Makefile tree, status.html, years.html, template/README.md.year

We add `make clang-format` to the Makefile tree.

Add `important disclaimers about contest status` link to `status.html`.

Update `years.html` due to recent commit that fixed typo for abstract of 2011/akari.

Improve `template/README.md.year` for future IOCCC contents.

Ran `make quick_www` to perform the above.

status.html

@@ -446,6 +446,8 @@
 <p>Please see the
 FAQ on “<a href="faq.html#status_json">status.json fields</a>”
 for more information the above JSON fields.</p>
+<p>See also the
+<a href="next/index.html#important-disclaimers-about-contest-status">important disclaimers about contest status</a>.</p>
 <hr style="width:10%;text-align:left;margin-left:0">
 <p>Jump to: <a href="#">top</a></p>
 <!--