Updated segwit support list
Updated segwit support list

Added Mycelium, pycoin and python-bitcoinlib

bitcoin-core/bitcoincore.org,bitcoin-core/bitcoincore.org,bitcoin-core/bitcoincore.org,btcdrak/bitcoincore.org,bitcoin-core/bitcoincore.org,btcdrak/bitcoincore.org,bitcoin-core/bitcoincore.org,btcdrak/bitcoincore.org,bitcoin-core/bitcoincore.org