Serialized storage

[Jasleen1]

We would like for the Storage to always get string values and get string values. The specific implementation of SEEMless could then serialize and deserialize accordingly.

• Create an enum that encompasses all the types of data a SEEMless directory may ever need to store.
• Implement serialization and deserialization for said enum. This would also include writing a wrapper around the function which gets keys, so that the location in the statemap is deterministic based on the type of object being written.

[Kevin Lewi]

Closed by #33