made a few changes here.

1) HTTP secret should return 401 not 403. Not sure what the hell I was
thinking with I wrote that.

2) if you pass the the of a key and pem, skydns will become tls enabled
instead of clear and waiting for hackers.

3)  in server.go I moved the imported packed below the std packages.
It's a go formatting idiom not sure if you like or not, but thought I'd
recommend.

4) fixed tests I broke. I didn't have time to write tests for tls, but I
tested and it worked great.
quick edit.
another quick readme edit
Merge pull request #86 from densone/master

TLS Support