Terraform 1.x support

[bmorrissirromb]

This change adds support for Terraform 1.x, both as a regular Config rule and an Organizational Config rule.

There's a few other minor changes thrown in here:

1. The liblogging import and invocations have been removed. They have been replaced by simple print statement.
2. Externalized the export function so that we have a model for how to break rdk.py up into more manageable files.
3. Remove a few TODOs and put them into the Issues list.
4. Add a few more data members to the RDK class, so that (for example), the account ID can be referenced as a property of the RDK object.