Adding support for internal ip/port usage.

This patch adds support for using -internal to register docker0
internal ip and port settings, instead of using the docker host
mapped ones.
Updated the README.md to reflect changes
added the binary
and now the linux_amd64 binary, not the darwin one
pulled out consul for now
and rebuild binary
added some code style suggestions
merged upstream
took out HostName for now
pulled merge
Merge pull request #18 from cnf/internal

Adding support for internal ip/port usage.