more cleanups

nifty/__init__.py

@@ -4,7 +4,6 @@ from .field import *
 from .domain_tuple import DomainTuple
 from .domain_object import DomainObject
 from .utilities import *
-from .field_types import *
 from .minimization import *
 from .spaces import *
 from .operators import *

nifty/field_types/__init__.py

-from .field_array import FieldArray

nifty/spaces/__init__.py

@@ -4,3 +4,4 @@ from .lm_space import LMSpace
 from .power_space import PowerSpace
 from .rg_space import RGSpace
 from .space import Space
+from .field_array import FieldArray