Oracle BulkCopy.
Added BulkCopy description
fix for GetDefaultMappingFromEnumType

changed type.IsNullable() to enumType.IsNullable()
Merge pull request #54 from lvaleriu/patch-1

Added BulkCopy description
Merge branch 'pr/n55_akrasov'
Fixed SqlServer BulkCopy method.
Fixed formatting.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.
Unit test refactoring.