flatten the mmcv/image dir and update to v0.3.2 (#197)

mmcv/image/__init__.py

 # Copyright (c) Open-MMLab. All rights reserved.
-from .io import imfrombytes, imread, imwrite, supported_backends, use_backend
-from .transforms import (bgr2gray, bgr2hls, bgr2hsv, bgr2rgb, gray2bgr,
-                         gray2rgb, hls2bgr, hsv2bgr, imcrop, imdenormalize,
-                         imflip, imflip_, iminvert, imnormalize, imnormalize_,
-                         impad, impad_to_multiple, imrescale, imresize,
-                         imresize_like, imrotate, posterize, rescale_size,
+from .colorspace import (bgr2gray, bgr2hls, bgr2hsv, bgr2rgb, gray2bgr,
+                         gray2rgb, hls2bgr, hsv2bgr, iminvert, posterize,
                          rgb2bgr, rgb2gray, solarize)
+from .geometry import (imcrop, imflip, imflip_, impad, impad_to_multiple,
+                       imrotate)
+from .io import imfrombytes, imread, imwrite, supported_backends, use_backend
+from .normalize import imdenormalize, imnormalize, imnormalize_
+from .resize import imrescale, imresize, imresize_like, rescale_size
 
 __all__ = [
     'solarize', 'posterize', 'imread', 'imwrite', 'imfrombytes', 'bgr2gray',

mmcv/image/transforms/__init__.py

-# Copyright (c) Open-MMLab. All rights reserved.
-from .colorspace import (bgr2gray, bgr2hls, bgr2hsv, bgr2rgb, gray2bgr,
-                         gray2rgb, hls2bgr, hsv2bgr, iminvert, posterize,
-                         rgb2bgr, rgb2gray, solarize)
-from .geometry import (imcrop, imflip, imflip_, impad, impad_to_multiple,
-                       imrotate)
-from .normalize import imdenormalize, imnormalize, imnormalize_
-from .resize import imrescale, imresize, imresize_like, rescale_size
-
-__all__ = [
-    'solarize', 'posterize', 'bgr2gray', 'rgb2gray', 'gray2bgr', 'gray2rgb',
-    'bgr2rgb', 'rgb2bgr', 'bgr2hsv', 'hsv2bgr', 'bgr2hls', 'hls2bgr',
-    'iminvert', 'imflip', 'imflip_', 'imrotate', 'imcrop', 'impad',
-    'impad_to_multiple', 'imnormalize', 'imnormalize_', 'imdenormalize',
-    'imresize', 'imresize_like', 'imrescale', 'rescale_size'
-]

mmcv/version.py

 # Copyright (c) Open-MMLab. All rights reserved.
-__version__ = '0.3.1'
+__version__ = '0.3.2'