From witches and black cats to costumes and candy, Halloween is here, and it’s the spookiest time of the year. When the clock strikes tonight’s witching hour and All Hallow’s Eve lays to rest, November will come creeping out from under the bed. Soon, a madness will take hold of shoppers everywhere as they begin their hunt for the best Cyber Monday deals.  Last year, the Monday after Thanksgiving raked in $7.9 billion in online…