#303 Refactoring of Convert
java.sql.Date, java.sql.Timestamp and java.sql.Time are all subclasses of java.util.Date, no need to test each individually. Added java.util.Date -> Long conversion. Some tests didn't work running in a different timezone.
#303 Implemented SQLiteDialect.overrideDriverTypeConversion()
Also refactored MSSQLDialect.overrideDriverTypeConversion()
#290 Corrections for SQLite, added ConverterTest.shouldSaveAndFetchDateAndTimestamp()