Added a bare bones die model
Add a initalize method to die

this allows a user to set the starting value of the die
added the roll function

the roll fuction sets the value of the die randomy
implament the <=> operator for compare able
implament the to_s method

this can be used give the user a english term for each of the sides of the dice
Implemnt the to_symbol method for dice

this returns the utf-8 die symol for the dice