Suggest an enhancement: use the region of the default profile in file "config"

I found this very handy:

```
       export AWS_PROFILE=$1;
       thisProfileRegion=$(aws configure get region --profile $1);
       defaultProfileRegion=$(aws configure get region --profile default);
       export AWS_REGION=${thisProfileRegion:-$defaultProfileRegion};
```

So that I only need to define region in the "config" file once.