Fix the code copied from Caddy to refer to Corefile and make 'coredns' with flags pickup a local Corefile. Also remove some references to Caddy in the docs and output of coredns. Fixes #235
The will prolly make automatic releases easier.
Set version and name of the program. And then call coremain.Run(). The coremain split makes CoreDNS embeddable. Also see #189 for an old PR.