Create separate Gemfile for Ruby 1.8.7
Update nokogiri dependency to version ~>1.5
[openstack|volume] support imageRef option

Volumes can be created with the imageRef option, which dictates which
image to base the volume off.
[openstack|compute] support block_device_mapping

Servers can be booted with block_device_mapping instead of image_id.
Add note about installing on Ruby 1.8.7 [ci skip]
[Openstack|volume] Add #get to volumes collection

This fixes reloading Volume objects and makes it consistent with other
collections.

Keeping find_by_id as an alias for compatibility.
[Openstack|volume] fix key name for volume_type

The cinder API uses volume_type instead of type.
removing coveralls support for Ruby 1.9.2 in hopes of fixing #1921
[Openstack|volume] create volumes from other vol.
Merge branch 'master' of github.com:fog/fog into coveralls_192
 removing coveralls support for Ruby 1.9.2 in hopes of fixing #1921 take two
try 3 in removing coveralls for ruby 1.9.2
trying to disable coveralls
[openstack|storage] added the ability to upload files using blocks in the same manner as the Rackspace provider
[openstack|storage] updating object tests to support ruby 1.8.7
Adds light documentation for GCE and GCS
Rackspace: add keypair support
AWS: remove logging
[Openstack|Volumes] alias type to volume_type

This makes the changes consistent with how it previously worked.
Merge pull request #1922 from grk/volume-create-image-ref

OpenStack: create volumes from images, boot servers with block device mapping