packer/rpc: if stream ID 0 is used, paic
packer/rpc: communicator shouldn't conncet to ID 0
builder/amazon/chroot: mount in device-specific places
builder/amazon: alphabetize
builder/virtualbox: move to iso/ folder
builder/virtualbox/iso: rename package
plugin/builder-virtualbox: new package
builder/virtualbox: add common package, common Artifact
builder/virtualbox/common: Move Driver here
builder/virtualbox/common: StepOutputDir
builder/virtualbox/common: StepSuppressMessages
builder/virtualbox/common: move outputdir config to common
builder/virtualbox: floppy files config
builder/virtualbox: step attach floppy
builder/virtualbox: generic SSHConfig
builder/virtualbox: StepVBoxmanage
builder/virtualbox: StepShutdown
builder/virtualbox: StepShutdown tests
builder/virtualbox/common: StepRemoveDevices
builder/virtualbox: StepRun common