* Expose a JDBC connection (session) via the ServiceHub for generic JDBC usage.
* Updated documentation.
* Fix failing JUnit following rebase from master.
* JDBC session Tutorial WIP
* Fix broken JUnits following update to consumeCash() using observable event update as return.
* Fixed broken JUnits.
* Refactoring createSession() into new CordaPersistence class following rebase from master.
* Updated fully working example.
* Minor updates following feedback from MH.
* Fixed compiler error following rebase.
* Fixes following rebase from master.
* Further updates and clarifications to documentation.