2nd Vertcoin network bootstrapping update

Add more nodes and cleanup for already updated nodes
Update README.md
Add option for 3rd VTC network

For future use ...
Merge pull request #2 from Lovok/patch-1

Patch 1
Donation info on modern dashboard

Re/enable danation info on modern dashboard
Change worker port for 3rd VTC network

to avoid Execoin p2pool port collision
Add second bootstrap node for 3rd VTC network
Update README.md

Add 3rd VTC network information
Add Caishen support

Based on information from here: https://bitcointa.lk/threads/ann-p2pool-cai-first-caishen-p2pool.291148/#post-6031449
As no full source was released, rest of values are default, guessed or based on Caishen source.
Until confirmed by thepool.pw it's not sure if it's 100% compatible but seems to work for now.
Add Caishen support
Fix CAI subsidy
Merge branch 'master' of https://github.com/donSchoe/p2pool-n into donSchoe-master

Conflicts:
	p2pool/bitcoin/networks.py
Merge
Merge pull request #30 from Lovok/master

Cleanup 2nd VTC, add 3rd VTC, add Caishen, fix #30