Adding a new region

[pkennedyvt]

The instructions for adding a new region are not complete. The actual steps are as follows:

• Update compliance-account-initial-setup.yaml to add the new region and run in the compliance account, in the new region. This will create the s3 codebuild-output bucket for the new region.
• Create an S3 bucket named config-rule-code-bucket-947791289618-%region%. This should be added to the CFN with an if doesn't exist. Alternatively, you could run rdk init in the new region
• Update the stack in the main region to include the parameter with the new region being added
• Invoke the pipeline, the proper lambda's will now be created.
• Run the application-account-initial-setup.yaml in the child account(s) in the new region

It should also be noted, if creating multiple regions at the beginning, all of the above needs to happen as well. Additionally, the defaults are for the "other regions" to only receive "otherregionsbaseline" tagged rules. Recommend that we change this to the same "baseline" tag as default.

I will fork the repo this weekend and create pull requests with new readme and the bucket creation that is missin