Close #32
Close #32

* Added constant `ScoreAbbr`
 * Changed keys from `String` to `Symbol`
 * Renamed some keys
  * `l` -> `ls`
  * `t` -> `tok`
  * `s` -> `ss`
  * `f` -> `fok` 
  * `h` -> `fh`
martimatix/Ruby_Dice