Remove gitmodules

Integrate api and lang into core

src/api/java/appeng/api/features/ILocatable.java

@@ -0,0 +1,17 @@
+package appeng.api.features;
+
+import appeng.api.events.LocatableEventAnnounce;
+
+/**
+ * A registration record for the {@link ILocatableRegistry} use the {@link LocatableEventAnnounce} event on the Forge
+ * Event bus to update the registry.
+ */
+public interface ILocatable
+{
+
+	/**
+	 * @return the serial for a locatable object
+	 */
+	long getLocatableSerial();
+
+}