Add list of desired roles in enterance

[sadrasabouri]

Is your feature request related to a problem? Please describe.
For some cases roles that we want for a particular game is rather different from current roles.

Describe the solution you'd like
another argv element could be assigned to role_lists so that program will run with it.
the program shall be played like
python3 mafia,py 6 {"Don" : 1, "Mafia" : 2, "Resident" : 3}
which means we want a game with 6 player(1 Don, 2 mafias and 3 residents)