Nested transastion feature. Very small but very useful. Only first level is the real start/commit. All nested transactions only increment/decrement the transaction depth level counter. Rollback resets a counter and rollbacks the transaction.
Nested transactions: SAVEPOINTS were added.
Nested transactions: SAVEPOINTS were added.
Nested transactions: SAVEPOINTS were added. Namespace fixed
Fixing coding style
Fixing default in the DB rollback transaction
Merge pull request #1610 from ose1955/1.8/develop

Nested transaction feature.