Fix: nested inTransaction(sf: SessionFactory), the inner tx is now
ignored as it should (thanks Sebastian Meßmer)

Conflicts:

	src/test/scala/org/squeryl/test/TransactionTests.scala
0.9.5-6-jdanbrown-1
Fix: Close connection in _executeTransactionWithin if first c.{get,set}AutoCommit throws
0.9.5-6-jdanbrown-2