Fix tifffile imports

skimage/io/_plugins/pil_plugin.py

@@ -14,7 +14,7 @@ except ImportError:
 from skimage.util import img_as_ubyte, img_as_uint
 
 from six import string_types
-from .tifffile import imread as tif_imread, imsave as tif_imsave
+from tifffile import imread as tif_imread, imsave as tif_imsave
 
 
 def imread(fname, dtype=None):

skimage/io/_plugins/tifffile_plugin.py

@@ -1,5 +1,5 @@
 try:
-    from .tifffile import imread, imsave
+    from tifffile import imread, imsave
 except ImportError:
     raise ImportError("The tifffile module could not be found.\n"
         "It can be obtained at "