Merge pull request #7 from eklein/master

Added a conditional around reading the config file from disk
Add hostname/ip to the --network output
Merge pull request #8 from davefds/add-hostname

Add hostname/ip to the --network output
bump version to 0.6.0
Added initial support for a few conveniences
- options[:add_authorized_keys] option, when set to the name of a public
  key file, the contents of that key file will be added to
  authorized_keys when the conainer is created.
- options[:copy_on_create] - a list of files (based in home dir) which
  will be copied to the host on creation. Handy for .gitconfig,
  .ssh/config, etc

Version bump to 0.7.0
Merge pull request #9 from adnichols/add_copy_files

Added initial support for a few conveniences