New rule modifiers

core/src/io/anuke/mindustry/game/RulePreset.java

@@ -28,6 +28,9 @@ public enum RulePreset{
         respawnTime = 60 * 10;
         buildCostMultiplier = 0.5f;
         buildSpeedMultiplier = 2f;
+        playerDamageMultiplier = 0.5f;
+        unitBuildSpeedMultiplier = 3f;
+        unitHealthMultiplier = 2f;
     }});
 
     private final Supplier<Rules> rules;

core/src/io/anuke/mindustry/game/Rules.java

@@ -19,6 +19,12 @@ public class Rules{
     public boolean pvp;
     /**Whether enemy units drop random items on death.*/
     public boolean unitDrops;
+    /**How fast unit pads build units.*/
+    public float unitBuildSpeedMultiplier = 1f;
+    /**How much health units start with.*/
+    public float unitHealthMultiplier = 1f;
+    /**How much damage player mechs deal.*/
+    public float playerDamageMultiplier = 1f;
     /**Multiplier for buildings for the player.*/
     public float buildCostMultiplier = 1f;
     /**Multiplier for building speed.*/