Replace DefaultKeyGenerator with other alternative. and allow user to override with their own keygen (if needed). Functional test included. *I need to modify the buildConfig, otherwise the functional test won't work in my local env
Update documentation on how to use our own key-generator
Merge pull request #2 from arief-hidayat/custom-keygen

Replace DefaultKeyGenerator with other alternative. and allow user to override with their own keygen (if needed)