Update README to reflect ca_path config option.
Merge pull request #14 from rjsamson/osx_certificates

Update README to reflect ca_path config option.
readme format
ensure the machine id is a string, catch ip detection issues, switch to a better ip detection method
make sure provision accounts for new provisioner shared folders, add provisioner to test Vagrantfile
add test box cookbooks path
centralize client instantiation
use the key and id provided in the config Fixes #16
remove spurious backup file, global ignore missing on dev machine :(
basic integration tests
readme cleanup