[google] Add support for network and external_ip

 * Add support for an other network than default
   ("default" network is still default network)
 * Can specify if creation or not of an external_ip
   (External_ip is still created by default)
[google-compute-engine] Add private_ip_address method for server
Merge branch 'new-network' of https://github.com/rvrignaud/fog into rvrignaud-new-network
[google] Add support for network and external_ip

 * Add support for an other network than default
   ("default" network is still default network)
 * Can specify if creation or not of an external_ip
   (External_ip is still created by default)
 * Add private_ip_address method for server
 * Add example for vm creation with network
Merge branch 'new-network' of https://github.com/rvrignaud/fog into rvrignaud-new-network
Examples tweak
remove networks
[Cloudstack|Compute] Add support for keypair and userdata when creating cloudstack vms
Merge branch 'master' into new-network
[google|compute] better check on server.public_ip_address
fixes #1434 : How to use vcloud fog services
[aws|elb] add new style default security group

* AWS VPC enabled accounts have a new style security
  group separate from the 'amazon-elb-sg' group.
* added describe account attributes call
* use account attributes to determine elb security group
[rackspace|monitoring] replaced entity_id and check_id attributes with entity and check attributes; removed entity_id from base module.
Merge pull request #2042 from gloppasglop/master

[Cloudstack|Compute] Add support for keypair and userdata when creating ...
Merge pull request #2051 from singhgarima/documentation_for_vcloud

fixes #1434 : How to use vcloud fog services
Allow users to create images in GCE.

In order to support this, we change the Image#save to accept
params from the user, and call insert_image. Also, we populate
the image model with the project name before returning the
object to the user.
Merge pull request #2049 from maginatics/gce_insert_image

[google|compute] Allow users to create images.
[core] excluded :headers hash from symbolize_credentials in order to properly pass headers onto Excon
[google|compute] Fix insert disk to deal with changes to insert image.
Merge pull request #2009 from rvrignaud/new-network

[google|compute] Add support for network and external_ip during server creation