Added license information

Author: Bernardo-MG

dice_notation/parser/common.py

@@ -13,6 +13,9 @@
 used.
 """
 
+__author__ = 'Bernardo Martínez Garrido'
+__license__ = 'MIT'
+
 
 class Parser(object):
     """

dice_notation/parser/dice.py

@@ -11,6 +11,9 @@
 Dice notation parsers.
 """
 
+__author__ = 'Bernardo Martínez Garrido'
+__license__ = 'MIT'
+
 
 class DiceParser(PlyParser):
     """

dice_notation/parser/notation.py

@@ -14,6 +14,9 @@
 expression.
 """
 
+__author__ = 'Bernardo Martínez Garrido'
+__license__ = 'MIT'
+
 
 class ConstantOperand(Rollable):
     """