Update contributions.adoc

Cleaned up some todo stuff.
Removed unnecessary line breaks for list.
Updated jme3 version to stable for tip.

src/docs/asciidoc/jme3/contributions.adoc

@@ -4,6 +4,7 @@
 :revdate: 2016/03/17 20:48
 :relfileprefix: ../
 :imagesdir: ..
+:experimental:
 ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 
@@ -13,7 +14,7 @@ The following list contains additional content for jMonkeyEngine 3 contributed b
 [TIP]
 ====
 To install a jMonkeyEngine SDK plugin, go to Tools→Plugins→Available Plugins. +
-(Currently only jME 3.0 stable SDK, jME 3.1 alpha does not yet support plugins)
+(Currently only jME 3.0 stable SDK, jME 3.1 stable does not yet support plugins)
 ====
 
 
@@ -44,18 +45,15 @@ link:http://hub.jmonkeyengine.org/c/contribution-depot-jme3[http://hub.jmonkeyen
 
 == Other Repos
 
-There are other repositories for code sources. A list of weblinks follows: +
-TODO: Organize these links (e.g. alphabetically or by topic).
+There are other repositories for code sources. A list of weblinks follows: 
 
-*  link:http://sourceforge.net/projects/jmonkeycsg/[http://sourceforge.net/projects/jmonkeycsg/] +
+*  link:http://sourceforge.net/projects/jmonkeycsg/[http://sourceforge.net/projects/jmonkeycsg/] 
 *  link:https://github.com/davidB/jme3_skel[https://github.com/davidB/jme3_skel]
 
 
 == Frameworks
 
-Those are premade classes/functionalities that you can use. +
-TODO: Either remove these old entries or make them up-to-date and add more.
-
+These are premade classes/functionalities that you can use. 
 
 
 === ImagePainter