Update README.md

Merge pull request #16 from Lafudoci/ban_nodes_02x

Add ban-list support

Fix monerod height parsing

Make version consist with git tag

Merge pull request #11 from Lafudoci/loop-fix

Reduce loop interval

Don't update DNS record if no node

keep records during scan

Fix for over deletion issue

Shorter update period

Edit license classifies in setup.py

Merge pull request #7 from Lafudoci/mass_scan_fix

Fix error handling

Merge pull request #5 from Lafudoci/cf_fix