Changed setCamZoom and setHudZoom from int to float

Now you can have float value cam/hud zooms :)

(Updated docs aswell)

source/ModchartState.hx

@@ -392,11 +392,11 @@ class ModchartState
 					return FlxG.camera.y;
 				});
 	
-				Lua_helper.add_callback(lua,"setCamZoom", function(zoomAmount:Int) {
+				Lua_helper.add_callback(lua,"setCamZoom", function(zoomAmount:Float) {
 					FlxG.camera.zoom = zoomAmount;
 				});
 	
-				Lua_helper.add_callback(lua,"setHudZoom", function(zoomAmount:Int) {
+				Lua_helper.add_callback(lua,"setHudZoom", function(zoomAmount:Float) {
 					PlayState.instance.camHUD.zoom = zoomAmount;
 				});