Added letter re-draw, music, drop animations
Added letter re-draw, music, drop animations

-Added letter re-draw feature and animation (you can now use words with repeated letters)
-Added animation to the drop event (scaling)
-Changed resolution to 800x600 
-Added button feedback to the menu (Atlas texture spritesheet: bluesheet.json)
-Added game music
-Added fadeIn/fadeOut sound effects
-Added click sound to the menu
-Added horizontal alignment to the frame
-Modified letter boxes aspect and size (drop event aligns and scales up the letter)
-Added/improved sound levels and mixing
ubykuo/aique,ubykuo/aique