Doc: use markup format for android build instructions.

port/AndroidJNI/README.txt

@@ -1,11 +1,11 @@
---- Description ---
-
-This module provides a facade to io stream access to files
-behind android asset manager within Android native application.
+Build Asset Importer Lib for Android
+====================================
+This module provides a fascade for the io-stream-access to files behind the
+android-asset-management within an Android native application.
 - It is built as a static library
 - It requires Android NDK with android API > 9 support.
 
---- Building ---
+### Building ###
 
 To use this module please provide following cmake defines:
 
@@ -14,14 +14,14 @@ To use this module please provide following cmake defines:
 
 "SOME_PATH" is a path to your cmake android toolchain script.
 
---- Code ---
+### Code ###
 
+A small example how to wrap assimp for Android:
+```cpp
 #include <assimp/port/AndroidJNI/AndroidJNIIOSystem.h>
 
-...
-
 Assimp::Importer* importer = new Assimp::Importer();
 Assimp::AndroidJNIIOSystem* ioSystem = new Assimp::AndroidJNIIOSystem(app->activity);
 importer->SetIOHandler(ioSystem);
 
-...
+```