builder/common: add StepProvision
builder/*: convert to common StepProvision
builder/vmware: error if guest IP is blank [GH-189]
builder/common: only count handshake error if auth tried
v0.2.0
website: fix download parsing
Up version for dev
builder/vmware: Add support for Workstation 9 (Linux).

Now the VMware builder should automatically pick between Fusion 5 and
Workstation 9, based on which one is installed.