Fixed not calculating subnets properly, oops!

v3.0.4

Fixing bad subnet calculation

Adding aws_account_id to outputs, to help with cross-stack integrations and ARN specifications

v3.0.2

Adding data source for aws account id

Minor bug fix, not using the right number of AZs

v3.0.1

Fixing a major bug, not using enough vpcs

Initial release to terraform module registry

v3.0.0

Update README.md