This commit currently breaks the builder though, since the ISo is now
uploaded back into ESX.

This driver talks directly to ESX over ssh, using vim-cmd, esxcli and sh;
no vCenter or VIM api required.

Remote* config properties added to support a remote driver

RemoteDriver interface extends Driver:
* SSHAddress - esx flavor uses esxcli to find the VM's ip address
* Download - esx flavor downloads iso files to a vmfs datastore

Driver can optionally implement the following interfaces:
* VNCAddressFinder - esx flavor needs to check remote ports
* OutputDir - esx driver needs a local and remote OutputDir
* Inventory - esx driver needs to register/unregister VMs
* HostIPFinder - esx flavor needs an address on the same network as esx itself

Update README.md to include updatedeps target

When new dependencies are included builds on your localrepo will fail
until you have all the latest dependencies in the GOPATH. After doing
updatedeps, make will generate the packer binary.
Signed-off-by: Prasanna Santhanam <tsp@apache.org>

builder/qemu: Qemu builder

Conflicts:
	builder/amazon/common/run_config.go

Conflicts:
	post-processor/vagrant/post-processor.go

builder/digitalocean: add a droplet_name configuration value

Practically, this lets you set the hostname of the droplet
used for provisioning.