Completed first pass at Stratiform utility.

This commit represents version 1 of the Stratiform utility, and
is feature-complete for the following items:

* Create a VPC ("sf-vpc")
* Create a service within that VPC ("sf-service")
* Create an operational tier within that service ("sf-tier")
* Create an environment with that tier ("sf-environment")

It includes configuration information for the Kuali Service West
VPC, the UAccess Research service, the Delivery and Development
tiers, and the Kuali Service Delivery and Kuali Coeus Demonstration
environments.  That should provide enough of an example to allow
fleshing out the remainder of the inventory.

Note that there are two remainming manual steps that Stratiform
can't accomplish, because the syntax to do it hasn't been released
for the AWS CloudFormation templates on which Stratiform depends:

* For the environment OpsWorks stacks, the associated RDS instances
are created, but you still have to go into the web interface and
manually associate the RDS instance with the OpsWork stack.

* Also for the OpsWorks stacks, although Stratiform will create
them using the latest version of Chef (11.10), you still have to
go into the web interface and turn on Berkshelf functionality
after the stack is created.

Hopefully, both of these remaining tasks will wind up automated
once OpsWorks resources have been part of the CloudFormation
service for a little longer.

This commit also marks the point at which Mike is letting go of
the code, and transitioning further development efforts to the
Kuali Service Delivery team.