Place NAT Gateways into public subnets

Place NAT Gateways into public subnets

Update tf_subnets with cidr_block input

Update tf_subnets with cidr_block input

Remove `data "aws_subnet_ids"` from `main.tf`

0.1.3

Remove `data "aws_subnet_ids"`. It's not used and breaks on new VPCs …

Add outputs.tf for public & private subnet ids

Add Outputs for public & private subnet ids (#5)

* Added outputs.tf

* Added `_ids` suffix to `outputs.tf` since the outputs are subnet IDs