TWC Patch 2014-08-28

Apologies for the large PR again. In the currents of change I haven't been able to get a process in place to do PRs per patch/feature. As of tomorrow that process should be in place though, so you should be seeing much smaller patches from us.

Changes:

New operation to the MachineImageSupport: copyImage, which copies given image to another region.
Main property to RoutingTable -- allows identification of main/default routetables over others.
Support for attributes (crossDataCenter, timeout, etc) on load balancers.
Add/remove listener support to load balancers.
Ability to set firewalls when creating load balancer.
Add health check info to LoadBalancer.
Add volume info to machine image.
Add set/list notificationConfigs to AutoScalingSupport.
Added synchronous call to create tags.
Deprecated subnetIds property (comma separated string) and added new String array for subnetIds in Scaling Groups.