Updated README with screenshot of latest GitHub WebHook URL service hooks page and latest GitHub public IP addresses for the hooks in CIDR notation
README copy tweak
Now supporting GitHub public IPs in CIDR notation using IP to CIDR matching. GitHub public ips have also been updated to include the IPS in CIDR notation as stated on 'WebHook URLs settings page', see new screenshot on the README, and https://help.github.com/articles/what-ip-addresses-does-github-use-that-i-should-whitelist
Merge pull request #7 from ollierattue/master

GitHub public IP whitelisting using latest IPs with CIDR notation support.