- Unit testing caching
https://github.com/openpeer/op/issues/159

- Implement caching "clear"
https://github.com/openpeer/op/issues/158

- Implement caching "fetch"
https://github.com/openpeer/op/issues/157

- Implement caching "store"
https://github.com/openpeer/op/issues/156

- Implement caching database preparation
https://github.com/openpeer/op/issues/155