Texas native Johnny Winter is revered as one of the finest and most prolific guitar slingers of his time, and finally on Friday night, I got to hear him play live for the first time at  Tupelo Music Hall in Londonderry, New Hampshire. Despite the winter snow storm that assaulted most of New Hampshire in the early part of the morning and afternoon, and dumped over half a foot of snow in most parts, it was as if divine intervention stepped in and cleared the way for Johnny.  By nightfall, the roads were again passable, which gave the green light for Winter's fans to pack into the sold out venue. Once the hats, mittens, and coats peeled off, the audience got snuggled in for a very special show.   Johnny and his band entered the stage together, and Johnny took his throne with his Erlewine guitar at a chair placed in the center of the stage with a microphone adjusted to the sitting position.  After a brief warm up, the band went straight into Hideaway.     Winter and his ban