Update appsettings.adoc

src/docs/asciidoc/jme3/intermediate/appsettings.adoc

@@ -109,7 +109,8 @@ a|0 (disabled)
 
 a|setDepthBits(16)
 a|Sets the number of depth bits to use. +
-The number of depth bits specifies the precision of the depth buffer. To increase precision, specify 32 bits. To decrease precision, specify 16 bits. On some platforms 24 bits might not be supported, in that case, specify 16 bits. 
+The number of depth bits specifies the precision of the depth buffer. To increase precision, specify 32 bits. To decrease precision, specify 16 bits. On some platforms 24 bits might not be supported, in that case, specify 16 bits. +
+See link:https://msdn.microsoft.com/en-us/library/bb976071.aspx[What Is a Depth Buffer?] and link:https://en.wikipedia.org/wiki/Z-buffering[Z-buffering] for a more in depth explaination.
 a|24
 
 |===
@@ -162,7 +163,7 @@ a|Default
 
 a|setTitle("My Game")
 a|This string will be visible in the titlebar, unless the window is fullscreen.
-a|"jMonkey Engine 3.0"
+a|"jMonkey Engine 3.1-stable"
 
 a|setIcons(new BufferedImage[]{ +
 ImageIO.read(new File(" ")), …});