add basic support for QueueConfigurations

[80avin]

Add preliminary support for NotificationConfiguration ( only QueueConfigurations yet )

Allows sending SQS events on S3 events.

fixes #98

[ar90n]

@80avin
Thanks for your PR. But I couldn't merge this PR for serverless-s3-local.
Because I want to keep serverless-s3-local simple. This means that serverless-s3-local isn't designed to support the full features of S3. If you want full-feature supported S3 integrated with lambda, Localstack will be helpful for your purpose.

[80avin]

@ar90n I understand.
It's okay if you want to delete or modify this PR. I created it since I had to implement this feature for my requirements, and then thought of pushing for more visibility.