Added some summaries

Interfaces/IDamageable.cs

@@ -1,10 +1,17 @@
+using UnityEngine;
+
 namespace GameDev.CoreSystems
 {
     public interface IDamageable
     {
         #region Methods
 
-        public void ModifyHealth(int healthChange);
+        /// <summary>
+        /// Modify the health of the damageable
+        /// </summary>
+        /// <param name="healthChange">Amount of health change</param>
+        /// <param name="source">Source GameObject, used to modify stats of the source. Total kills, etc.</param>
+        public void ModifyHealth(int healthChange, GameObject source);
 
         #endregion
 

Interfaces/IWeapon.cs

@@ -2,7 +2,13 @@ namespace GameDev.CoreSystems
 {
     public interface IWeapon
     {
+        /// <summary>
+        /// [s] Fire rate of the weapon
+        /// </summary>
         public float FireRate { get; set; }
+        /// <summary>
+        /// Weapon damage
+        /// </summary>
         public int Damage { get; set; }
     }
 }