API GW support

[glebsts]

trafficstars

Hello, I can understand that development of this awesome plugin goes slow because of lack of resources, so this issue will be here just as a placeholder for feature request. API GW sources are here So one can easily add its support to gradle-aws-plugin. Personally I am interested in this feature, but not that critically to implement it during my work time (as it was with vpc support), as we only have couple of lambdas and can configure them through web and cli. But in general it would be nice to have both lambda deploy and api gw conf in single gradle config to be executed during continuous delivery. API GW is especially interesting in response code matching part, as this currently is configured in very weird manner.