[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.
Adds support for encrypted EBS volumes
Merge pull request #1194 from gregburek/encrypted-ebs

Adds support for encrypted EBS volumes
Update CHANGELOG.md
Fix website shell provisioner typo.
Merge pull request #1199 from krismolendyke/fix-website-typo

Fix website shell provisioner typo.
Fix staging_directory default path
Merge pull request #1205 from humboldtux/patch-1

Fix staging_directory default path
Fix chroot builder to work with chef-solo

According to be5adb92b5c4d5d95e5089be94c706b930fea7ba, the UploadDir
method supports two ways of copying depending on whether a trailing
slash is used:
    src = "dir"  -> dest/dir
    src = "dir/" -> dest

On BSD-based systems (such as OSX, FreeBSD, etc.) the `cp -R` command
handles these two cases automatically.  However, Linux treats "src/" and
"src" the same.

To support the trailing slash syntax portably, we can use:
    src = "dir"   -> dest/dir
    src = "dir/." -> dest

This works on BSD and Linux.  It is better than using wildcards as it
grabs hidden files as well.

This fixes #1196 that prevents the chef-solo provisioner from working
with the chroot builder.
Merge pull request #1209 from blt04/fix-chef-solo-chroot

Fix chroot builder to work with chef-solo provisioner. Fixes  #1196
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