Update to ruby-standalone 1.8.0 and delegate publishPacts to new pact-publish executable

[bethesque]

The pact-publish command merges pact files for the same consumer/provider (that have been created by running in specs in parallel) before publishing them to the broker.

Usage:
  pact-publish PACT_DIRS_OR_FILES ... -a, --consumer-app-version=CONSUMER_APP_VERSION -b, --broker-base-url=BROKER_BASE_URL

Options:
  -a, --consumer-app-version=CONSUMER_APP_VERSION  # The consumer application version
  -b, --broker-base-url=BROKER_BASE_URL            # The base URL of the Pact Broker
  -n, [--broker-username=BROKER_USERNAME]          # Pact Broker basic auth username
  -p, [--broker-password=BROKER_PASSWORD]          # Pact Broker basic auth password
  -t, [--tag=TAG]                                  # Tag name for consumer version. Can be specified multiple times.
  -v, [--verbose=VERBOSE]                          # Verbose output

Publish pacts to a Pact Broker.

[mefellows]

cc: @mboudreau I assume this needs to go in pact-node?

[mboudreau]

@mefellows pact-node/pact-standalone, yep.

[mefellows]

Done ;)