Add --config Release to command

Also add markdown colorization support

Author: mulle-nat

README.md

@@ -11,7 +11,7 @@ You can feed it binary or text files.
 You can copy/paste the output as string contents into your C source or `#include` 
 the output like so:
 
-```
+``` c
 static char  data[] =
 #include "data.inc"
 ;
@@ -32,18 +32,18 @@ Let's use **mulle-c-string-escape** to create a C string representation of
 itself into a file "x.inc". We use `cmake` here, instead of `mulle-sde craft --release`, to ease 
 the developer's fear of the unknown:
 
-```
+``` sh
 mkdir -p kitchen/Release
 cmake -B kitchen/Release -DCMAKE_BUILD_TYPE=Release
-cmake --build kitchen/Release
+cmake --build kitchen/Release --config Release
 ./kitchen/Release/mulle-c-string-escape \
    ./kitchen/Release/mulle-c-string-escape \
    x.inc
 ```
 
 To verify that this has actually worked:
 
-```
+``` sh
 cat <<EOF > x.c
 #include <stdio.h>
 
@@ -74,7 +74,7 @@ This is a [mulle-sde](https://mulle-sde.github.io/) project.
 It comes with its own virtual environment and list of dependencies.
 To fetch and build everything say:
 
-```
+``` sh
 mulle-sde craft
 ```