BUG: Fixed Options.get_forward_data expiry date

Method assumed expiry date is the same for all option in a given month.
Not the case for options with weekly's.  Also breaks with options that
have tags.
BUG: Fixed Option bug that didn't allow LEAP DL in January.

Option class was checking only the month to determine if the requested
month was the current month.  Changed to check year and month.  Now
allows downloads of next years LEAPS's in January.