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/endoh1/README.md

@@ -64,7 +64,7 @@ This is a tool *for C programmers* to play the [SKI combinator calculus][1],
 especially, [Lazy K][2].
 
 This program will shine when it is used as a library.  For example,
-[hello.lazy](hello.lazy) is a "Hello world" program written in Lazy K.
+[hello.lazy](%%REPO_URL%%/2013/endoh1/hello.lazy) is a "Hello world" program written in Lazy K.
 
 ``` <!---sh-->
     $ lazy hello.lazy
@@ -72,7 +72,7 @@ This program will shine when it is used as a library.  For example,
 ```
 
 where `lazy` is [a reference implementation of Lazy K][3].  At the same time,
-[hello.lazy](hello.lazy) is *a valid C program* that uses [endoh1.c](endoh1.c)
+[hello.lazy](%%REPO_URL%%/2013/endoh1/hello.lazy) is *a valid C program* that uses [endoh1.c](%%REPO_URL%%/2013/endoh1/endoh1.c)
 as a library.
 
 ``` <!---sh-->
@@ -162,7 +162,7 @@ The whole program is interpreted by macro expansion.
 For example, `S (K I)` is translated to a normal C code, `(s)((k)(i))`, or
 simply `s(k(i))`.
 
-This expression returns an abstract syntax tree, and [endoh1.c](endoh1.c)
+This expression returns an abstract syntax tree, and [endoh1.c](%%REPO_URL%%/e2013/endoh1/ndoh1.c)
 evaluates it.
 
 This program uses a very simple "term rewriting" approach for evaluating SKI