Clarified physics table to note only 1 of 2 libraries can be used.

src/docs/asciidoc/jme3/jme3_source_structure.adoc

@@ -54,10 +54,10 @@ a| LWJGL OpenGL display implementation. +++<strike>Android</strike>+++
 a| Source Package
 a| Description
 
-<a| src/jbullet
+<a| pass:[*] src/jbullet
 a| Game Physics Engine, based on the jBullet framework. Desktop only. +++<strike>Bullet</strike>+++
 
-<a| src/bullet
+<a| pass:[*] src/bullet
 a| Game Physics Engine, based on the native Bullet framework. Needs jme3-bullet-native or jme3-bullet-native-android (beta) +++<strike>jBullet</strike>+++
 
 a| src/bullet-common
@@ -66,14 +66,14 @@ a| Classes common between native and java Bullet implementations.
 a| src/bullet-native
 a| Native Bullet implementation pass:[C++] classes. +++<strike>jBullet</strike>+++
 
-a|src/jme3-bullet-native-android
-a|Native libraries needed for bullet (not jbullet) on android.
+a| src/jme3-bullet-native-android
+a| Native libraries needed for bullet (not jbullet) on android.
 
 |===
 
 [NOTE]
 ====
-Only one of the physics libraries can be used at a time as they replace each other.
+pass:[*] Only one of the physics libraries can be used at a time as they replace each other.
 ====