Minor change to Character.js

fix initialisation of X and Y pos of IObject
implement reset position for the Character for use by Stop button
Remove unused codes

Remove unused codes and comment lines in command & frontcommand js
Update Game.js

Implement a general function for setting random position for character
& object
Inserted dummy resetCharacter() to reset the Character
Insert resetCharacter() for StopEditor

StopEditor calls the game object to reset the character