[feature] Support boot command for pvm builder

Similar to [GH-1082] but for parallels-pvm builder.
Parallels builder mistypes boot command on OmniOS

Fixes [GH-1185] and adds tests for the boot command.
Also requires the latest prl-utils (e592a15) to fix the stuck on enter
while typing.
Update GCE source_image to debian-7-wheezy-v20140415
Added documentation page for environmental variables. #1130
Changed the ordering of the environmental variables to be alphabetic.
Add option to enable enhanced networking (SriovNetSupport) for images.
Docs updated with new config option
Parallels errors while creating floppy disk GH-1225

Patch applied with modifications - tests updated to pass.
Parallels-iso errors while removing floppy drive GH-1226

Status "stopping" should be handled in IsRunning
Update run_config.go
Merge pull request #1238 from mnaser/patch-2

Update run_config.go
Fixes #1244, Add a check for upload iso hash to ESXi Driver
update vmware-vmx docs
Merge pull request #1255 from rjocoleman/fusion

vmware-vmx clarify VMware Fusion support
Force IPv4 addresses from address pools in Openstack. Fixes #1258

Rackspace defaults to a public IPv4 and IPv6 address. These are returned in
random order, with the sprintf further on generating an incorrect connection
string if on IPv6. Force IPv4 until support for correct connection strings and
a configuration flag for logging in over IPv6 is added.
Add ability to configure networks for openstack

Add configuration option `networks`, a list of network UUIDs, to attach to the
source instance.

In some openstack installs, no default network will be attached or the network
with the ability to attach a public floating IP will need to be specified.
Merge pull request #1259 from lflux/openstack-force-ipv4-ssh

Force IPv4 addresses from address pools in Openstack. Fixes #1258
Update CHANGELOG.md
Reorder documentation into alphabetical order
Don't use a real domain in examples.

Use example.com instead.