Merge pull request #110 from IQAndreas/fix-flxgroup-kill

Add `FlxGroup::revive()`

org/flixel/FlxGroup.as

@@ -568,9 +568,29 @@ package org.flixel
 				if((basic != null) && basic.exists)
 					basic.kill();
 			}
+
+			// Kill the group itself
 			super.kill();
 		}
 
+		/**
+		 * Calls revive on the group itself and then on the group's members.
+		 */
+		override public function revive():void
+		{
+			// Revive the group itself
+			super.revive();
+
+			var basic:FlxBasic;
+			var i:uint = 0;
+			while(i < length)
+			{
+				basic = members[i++] as FlxBasic;
+				if((basic != null) && !basic.alive)
+					basic.revive();
+			}
+		}
+
 		/**
 		 * Helper function for the sort process.
 		 *