add hack-a-round for language specified markdown code blocks

When language is specified in a markdown code block such as:

````
```c
    printf("Hello, world!\n");
```
````

is used, the resulting HTML as produced by `pandoc(1)` combined
with our revised `ioccc.css` is not intent the code block well.

A temporary "_hack-a-round_" is to turn the "markdown code language
specifier" into an HTML comment.  For example:

````
```<!---c-->
    printf("Hello, world!\n");
```
````

This commits turns off existing markdown code language specifiers
for now, while preserving our ability to restore them in the future
when a better  "_hack-a-round_" to the "markdown code language
specifier" problem is found.

The HTML impact if this "_hack-a-round_" is to produce HTML that
looks like this:

```
<pre class="&lt;!---c--&gt;"><code> .. </code></pre>
```

We might be able to create a complex set of classes for each markdown
code language (there won't be very many) in `ioccc.css`, or we might
find a more general CSS (or maybe `pandoc(1)`?) solution.

For now, this hack-a-round will have to do.

2011/hamaji/README.md

@@ -1,27 +1,27 @@
 ## To build:
 
-```sh
+```<!---sh-->
     make
 ```
 
 
 ## To use:
 
-```sh
+```<!---sh-->
     ./hamaji < a_nonogram_file
 ```
 
 
 ## Try:
 
-```sh
+```<!---sh-->
     ./try.sh
 ```
 
 If you have perl installed you should be able to reproduce
 [dragon.nono](dragon.nono) like:
 
-```sh
+```<!---sh-->
     perl c2nono.pl hamaji.c | ./hamaji
 ```
 
@@ -181,7 +181,7 @@ with the well obfuscated code.
 This program uses two C99 features. One line comments and `long long`.
 GCC's `-ansi -pedantic` check should pass:
 
-```sh
+```<!---sh-->
     cc -ansi -pedantic -std=c99 hamaji.c
 ```
 
@@ -196,7 +196,7 @@ memory layout, undefined evaluation order (e.g., `a[i++]=i`), etc.
 This program won't work if the size of `long long` literal is less than 8.
 By grepping the source code of gcc
 
-```sh
+```<!---sh-->
     grep LONG_LONG_TYPE_SIZE gcc/config/*/*
 ```
 
@@ -224,7 +224,7 @@ was randomly generated. The [codegolf.nono](codegolf.nono) and
 You can reproduce [dragon.nono](dragon.nono) from [hamaji.c](hamaji.c) using
 [c2nono.pl](c2nono.pl):
 
-```sh
+```<!---sh-->
     perl c2nono.pl hamaji.c | ./hamaji
 ```
 

2011/hamaji/index.html

@@ -144,14 +144,14 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <h2 id="to-build">To build:</h2>
-<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">make</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    make</code></pre>
 <h2 id="to-use">To use:</h2>
-<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./hamaji</span> <span class="op">&lt;</span> a_nonogram_file</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./hamaji &lt; a_nonogram_file</code></pre>
 <h2 id="try">Try:</h2>
-<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>    <span class="ex">./try.sh</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    ./try.sh</code></pre>
 <p>If you have perl installed you should be able to reproduce
 <a href="dragon.nono">dragon.nono</a> like:</p>
-<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">perl</span> c2nono.pl hamaji.c <span class="kw">|</span> <span class="ex">./hamaji</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    perl c2nono.pl hamaji.c | ./hamaji</code></pre>
 <h2 id="judges-remarks">Judges’ remarks:</h2>
 <p>This program solves <a href="http://en.wikipedia.org/wiki/Nonogram">Nonograms</a> which is
 also known as “Paint by Numbers”.</p>
@@ -260,7 +260,7 @@ with the well obfuscated code.</p>
 <h3 id="portability">Portability</h3>
 <p>This program uses two C99 features. One line comments and <code>long long</code>.
 GCC’s <code>-ansi -pedantic</code> check should pass:</p>
-<div class="sourceCode" id="cb11"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">cc</span> <span class="at">-ansi</span> <span class="at">-pedantic</span> <span class="at">-std</span><span class="op">=</span>c99 hamaji.c</span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    cc -ansi -pedantic -std=c99 hamaji.c</code></pre>
 <p>I checked my program with gcc-4.6.2 on linux, llvm-gcc-4.2 on Mac, and
 clang-3.0 on Mac.</p>
 <p>Note that the behavior of <code>scanf(3)</code> differs on linux and mac, but this
@@ -269,7 +269,7 @@ program supports both semantics.</p>
 memory layout, undefined evaluation order (e.g., <code>a[i++]=i</code>), etc.
 This program won’t work if the size of <code>long long</code> literal is less than 8.
 By grepping the source code of gcc</p>
-<div class="sourceCode" id="cb12"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">grep</span> LONG_LONG_TYPE_SIZE gcc/config/<span class="pp">*</span>/<span class="pp">*</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    grep LONG_LONG_TYPE_SIZE gcc/config/*/*</code></pre>
 <p>I found long long may be 32bit integers only on AVR.</p>
 <h3 id="a-few-more-things">A few more things</h3>
 <p>This code is considered as a <a href="http://en.wikipedia.org/wiki/Japanese_New_Year#Postcards">new year’s postcard in
@@ -287,7 +287,7 @@ was randomly generated. The <a href="codegolf.nono">codegolf.nono</a> and
 <a href="https://web.archive.org/web/20130218055139/http://codegolf.com/paint-by-numbers" class="uri">https://web.archive.org/web/20130218055139/http://codegolf.com/paint-by-numbers</a>.</p>
 <p>You can reproduce <a href="dragon.nono">dragon.nono</a> from <a href="hamaji.c">hamaji.c</a> using
 <a href="c2nono.pl">c2nono.pl</a>:</p>
-<div class="sourceCode" id="cb13"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb13-1"><a href="#cb13-1" aria-hidden="true" tabindex="-1"></a>    <span class="fu">perl</span> c2nono.pl hamaji.c <span class="kw">|</span> <span class="ex">./hamaji</span></span></code></pre></div>
+<pre class="&lt;!---sh--&gt;"><code>    perl c2nono.pl hamaji.c | ./hamaji</code></pre>
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