Resource provider regeneration

Implemented resource regeneration computation in the
verse.compute_provider_regeneration() function.

Created the PLANET_RES_REGEN update type, and added the corresponding
implementation.

Added resource regeneration constants registration.

legacyworlds-server-beans-system/src/main/java/com/deepclone/lw/beans/sys/ConstantsRegistrarBean.java

@@ -53,6 +53,14 @@ public class ConstantsRegistrarBean
 				true ) );
 		cDesc = "Initial universe size (offset relative to the centre).";
 		defs.add( new ConstantDefinition( "game.universe.initialSize" , "Universe" , cDesc , 1.0 , 1.0 , true ) );
+		
+		// Natural resources
+		cDesc = "Global recovery rate multiplier for natural resources. This should be kept close to 0.";
+		defs.add( new ConstantDefinition( "game.resources.recovery" , "Natural resources" , cDesc , 0.01 , 0.00001 ,
+				1.0 ) );
+		cDesc = "Resource recovery dampener. Lower means less dampening";
+		defs.add( new ConstantDefinition( "game.resources.recoveryDampening" , "Natural resources" , cDesc , 1.5 , 1.0 ,
+				true ) );
 
 		// Happiness
 		String[] hcNames = {