builder/parallels: Detect path to Parallels Tools ISO automatically

"guest_os_distribution" become deprecated and is not required anymore.
But if it is defined (in outdated templates),then the value will be copied to "guest_os_type" and warning will be displayed.

'parallels_tools_host_path' param is deprecated
'parallels_tools_flavor' is added (mandatory).

builder/openstack: error out when gets blank keypair

builder/qemu: add machine_type option for qemu builder.

builder/openstack: Make region not required if not rackspace

builder/amazon-instance: Use Region not S3Endpoint (see Issue 1424)

Updating check for version when on devel.

website: Updating Ubuntu 12.04 ISO location and checksum

docs: toc and title fixes

builder/digitalocean: add ability to set api url in template

builder/amazon-instance: It's possible to create instance-store images from EBS-based images

It's not necessary to use an instance-store image to build an instance-store image, see this example http://sorcery.smugmug.com/2014/01/29/instance-store-hvm-amis-for-amazon-ec2/ so there should be no restriction on the ExpectedRootDevice

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>

builder/parallels: Added some navigation keys in "boot_command". Fixes [GH-1442]

Enhancements for Parallels builder

We have to set either 'ostype' or 'distribution', but not both.

parallels: Support for Parallels Desktop 10

Fixed multiple VMware typos.

Add `page_title` attribute to each documentation file for which it didn't already exist, matching the value to each page's h1, respectively.

Allow specifying project for source images in GCE

Within GCE, images may be shared across projects. Prior to this
commit, there was no way to inform the GCE builder that a source
image belonged to a specific project. This adds an optional
'source_image_project_id' key to the GCE builder config.