DiceParser
==========

Rolisteam Dice Parser

The grammar is something like this:

Command =: Expression

Expression =: number | number Dice | ScalarOperator Expression

Dice =: DiceOperator Number(faces)

DiceOperator =: D

ScalarOperator =: [x,-,*,x,/]

number =: [0-9]+

Validator =: number | [operator number] | [ number - number ]