recent pharo changes to zero-conf api have broken all pharo builds

[dalehenrich]

here's the first of many failures https://travis-ci.org/dalehenrich/gsDevKitHome/jobs/57579487#L431

[dalehenrich]

wget -O- get.pharo.org/vmLatest | bash no longer works and must be replace by wget -O- get.pharo.org/vm30 | bash ....