Database Savepoints (Nested Transactions With Savepoints)
Merge branch 'db-savepoint' of git://github.com/golovanov/cphalcon into golonanov-db-savepoint

Conflicts:
	ext/db/adapter.c
	ext/db/adapter.h
	ext/db/adapterinterface.c
	ext/db/adapterinterface.h
	ext/db/dialect/oracle.c
	ext/db/dialect/oracle.h
	ext/db/dialectinterface.c
	ext/db/dialectinterface.h
	unit-tests/DbTest.php