Add Oracle-Store implementation.

[DerHulk]

Dear Mr Craver, i have implemented a datastore to Oracle-DB. I hope this will help other develpers in future if the need oracle support. Maybe you are interested to include it to your great Exceptional lib. What i don't know is if the oracle licence for the oracle client (Nuget Oracle.ManagedDataAccess.Core) is a problem for the licence of your project.