fix topbar to work on mobile devices

The topbar, by way of JavaScript, now works
on mobile devices such as cell phones and
tablets.

Internal links for entries from 1984 thru 2015
have been adjusted.

Ran `make www` to perform the above.

TODO: Fix some color issues on topbar.

TODO: More testing!

2013/endoh2/README.md

@@ -16,7 +16,7 @@ You'll need to have both [Ruby](https://www.ruby-lang.org) and
 checks.
 
 If you do not have both, however, you can still do the below in the [try](#try)
-section to enjoy the entry. The [Makefile](Makefile) `check` rule will check if
+section to enjoy the entry. The [Makefile](%%REPO_URL%%/2013/endoh2/Makefile) `check` rule will check if
 you have both and if either is not found it will report it and tell you where to
 download one or both before exiting.