Release of libdeltacloud 0.7.0

I just pushed out a new release of libdeltacloud v0.7. This version adds the ability to override specific portions of a hardware profile when launching an instance. For example, when launching a cloud instance on GoGrid, you have the choice of several pre-canned instance sizes. However, you can also optionally override the amount of memory while launching the instance, so you get something of a "custom" size. This new libdeltacloud release allows for custom memory, CPU, and storage sizes when launching instances.