add ability to return keys from a batch
Merge pull request #57 from aaberg/execute_batch_return_keys

add ability to return keys from a batch
fixes #56 - JNDI InitialContext was never closed.
No longer running oracle tests as default, as they are an obstacle for developers when building sql2o
Renamed table. The same table name was used in another test, which made this test fail when running all tests.
merge master
add some null checks