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!

2015/duble/README.md

@@ -29,7 +29,7 @@ ctrl-c/sending intr.
 ## Alternate code:
 
 This alternate code, provided by the author, is discussed in more detail by the
-author in the '[prog.c](prog.c) vs [prog.alt.c](prog.alt.c)' section of their remarks.
+author in the '[prog.c](%%REPO_URL%%/ 2015/duble/prog.c) vs [prog.alt.c](%%REPO_URL%%/2015/duble/prog.alt.c)' section of their remarks.
 
 
 ### Alternate build:
@@ -67,7 +67,7 @@ blasphemous. When I was fighting to make this program work, I started
 wondering if it was not the reason for its very erratic behaviour.
 
 
-### [prog.c](prog.c) vs [prog.alt.c](prog.alt.c)
+### [prog.c](%%REPO_URL%%/2015/duble/prog.c) vs [prog.alt.c](%%REPO_URL%%/2015/duble/prog.alt.c)
 
 The file [prog.alt.c](prog.alt.c) is the one I submitted.