Update for the server configuration class
NameDomain for Mods: the prefix

The NameDomain of Mods is the prefix you can/should use before block
names, textures and entities.

Examples:
Stone block by the BetterStones mod: betterstones.stone
Wolf mod by the Wolves mod: wolves.normal_wolf
Texture for the better stone: betterstones.stone.png
Changed URLs to Strings & JavaDoc update

Before you had to make use of the java.net.URL class. This has been
changed because of the endless exception handling.
General JavaDocs update