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.

2012/omoikane/README.md

@@ -1,6 +1,6 @@
 ## To build:
 
-```sh
+```<!---sh-->
     make
 ```
 
@@ -12,7 +12,7 @@ theoretically work with Windows which distinguishes binary and text. See
 
 ## To use:
 
-```sh
+```<!---sh-->
     ./nyaruko [seed.txt] < original.bin > output.c
     bash output.c > key.c
     perl output.c > data.c
@@ -30,7 +30,7 @@ binary itself.
 
 ## Try:
 
-```sh
+```<!---sh-->
     ./try.sh
 ```
 
@@ -53,13 +53,13 @@ binary mode on `stdin` and `stdout`.
 For the first version:
 
 
-```sh
+```<!---sh-->
     make alt
 ```
 
 For the second version:
 
-```sh
+```<!---sh-->
     make alt2
 ```
 
@@ -73,7 +73,7 @@ Use `nyaruko.alt` or `nyaruko.alt2` as you would `nyaruko` above.
 
 For the first alternate version:
 
-```sh
+```<!---sh-->
     ./try.alt.sh
 ```
 
@@ -93,7 +93,7 @@ The judges have nothing to add that has not already been written about in the
 `Nyaruko` is a binary to text filter.  Given some input on `stdin`,
 `Nyaruko` will produce C code that reproduces this input on `stdout`:
 
-```sh
+```<!---sh-->
     ./nyaruko < original.bin > output.c
     gcc output.c -o output
     ./output > regenerated.bin
@@ -102,7 +102,7 @@ The judges have nothing to add that has not already been written about in the
 Output is encrypted, but both key and data are included in the output.
 To separate the key from the data, run these commands:
 
-```sh
+```<!---sh-->
     bash output.c > key.c
     perl output.c > data.c
 ```
@@ -114,7 +114,7 @@ why the code is formatted the way it is.
 To combine the key and data, concatenate them together in either
 order:
 
-```sh
+```<!---sh-->
     cat key.c data.c > output.c
     cat data.c key.c > output.c
 ```
@@ -123,7 +123,7 @@ By default, `Nyaruko` generates a unique random key for every message,
 using `/dev/urandom` as the seed.  If given an extra command line
 argument, `Nyaruko` will seed using that file instead of `/dev/urandom`:
 
-```sh
+```<!---sh-->
     ./nyaruko seed.txt < input.bin > output.c
 ```