Revert "bump: replace aws with ec2"

This reverts commit 0ff198dc81d35744b2c48c2287d26737cea1eb88.
Revert "remove aws support, ec2 script takes keypair and instance type as args"

This reverts commit 2eba75accc4a96e103b5fad380b81483beea251b.
aws region support, defaults to us-west-1
bump
use make for gem build and publish