Update README.md

Added info about 2nd VTC network worker port changing.
Update networks.py

Add rotocoin.
Update networks.py

Add rotocoin.
Update networks.py
Update networks.py

Change default worker port to better support both networks on same address and node scanning. Can be changed by '--worker-port 9171' if you wish to use default port instead.
Update README.md
Fix Rotocoin bootstrap

Add active Rotocoin p2pool node
Merge pull request #21 from Lovok/master

Add Rotocoin support