Dropped the new SD2 Module in

src/modules/SD2/docs/Script_Layout.md

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+Script source code layout
+=========================
+In order to make it easier to find scripts, we have agreed on a fixed naming scheme
+for directories and scripts.
+
+Directories
+-----------
+* **battlegrounds**: contains scripts used in the Alterac Valley, Arathi Basin and
+  Warsong Gulch battlegrounds.
+* **eastern_kingdoms**: contains scripts for area triggers, creatures, dungeons,
+  instances, etc. related to the Eastern Kingdoms continent. Instances located on
+  Eastern Kingdoms are grouped in sub-directories by instance name.
+* **kalimdor**: contains scripts for area triggers, creatures, dungeons, instances,
+  etc. related to the Kalimdor continent. Instances located on Kalimdor are grouped
+  in sub-directories by instance name.
+* **world**: contains scripts which are used on every map, and not limited to one
+  specific zone. This includes scripts for area triggers, game objects, items, and
+  some creatures which can be found over the world. Also, scripts for spells are
+  stored here.
+Contains scripts for anything that is not related to a specified zone.
+
+Naming Conventions
+------------------
+Source files should be named `type_objectname.cpp` where
+
+* *type* is replaced by the type of object,
+* and *objectname* is replaced by the name of the object, creature, item, or area
+  that this script will be used by.
+
+`AddSC` functions used for registering scripts to the server core should use the
+form of `void AddSC_filename(void);`.