builder/vmware: Add a 'skip_compaction' configuration option

website: Document 'headless' option for Fusion and VBox

helptext has command [options] in it

/cc @smerrill

/cc @smerrill

builder/vmware, builder/virtualbox: Headless mode

builder/virtualbox, builder/vmware: wait5 and wait10 timers

/cc @smerrill: I prefer to do state changes at the end. :)

builder/vmware: Compact disk at end of the run

website: capitalize "Packer"

website: typos

Fix import paths in "make test" dependency fetching

When running "make test" on my machine, I got many unrecognized import
path errors, and the path showed a trailing "\n". Changing the go list
format to remove the newline fixed these.