missing module exports

[jerzyk]

method __init__ of class OleFileIO is using constants in parameter declarations, but those constants are not exported in __all__, of course they could be redefined in the module that is implementing a class inheriting from OleFileIO... but it is breaking DRY.

Could you please add DEFECT_UNSURE, DEFECT_POTENTIAL, DEFECT_INCORRECT, DEFECT_FATAL and DEFAULT_PATH_ENCODING to exports?

[decalage2]

Also need to add NOSTREAM, as mentioned in decalage2/oletools#204

[decalage2]

fixed by commit defd983