Breaking changes

Renamed method to rotate_method inside Rotate to keep consistency between naming parameters. (#1258 by @Dipet, thanks to @MichaelMonashev)

New augmentations

RandomCropFromBorders - Crops image based on indents from image borders. (#1240 by @Dipet based on #476 by @ZFTurbo)
BBoxSafeRandomCrop - Crops image without loss of bboxes. Instead of RandomSizedBBoxSafeCrop this implementation do not apply resize to target size. (#579 by @SunQpark)
Spatter - Simulates corruption which can occlude a lens in the form of rain or mud. (#573 by @akarsakov)
Defocus - Imitates lens defocusing. (#551 by @akarsakov)
ZoomBlur - Imitates lens blur on zoomig. (#551 by @akarsakov)

Fixed wrong result in RandomBrightnessContrast when brightness_by_max=False. (#487 by @Dipet)
Fixed wrong bbox clipping inside Perspective and Affine. (#1231 by @Dipet)
Fixed incorrect removal of bboxes when min_visibility=0 or min_visibility=1. (#616 by @IlyaOvodov)
Fixed wrong keypoint's cropping inside Rotate when crop_border=True. (#1250 by @Dipet, thanks to @jonkoi)
Fixed wrong propagation of always_apply Compose children. (#561 by @albu)
RandomSunFlare now correctly works with src_color, and use all three color values. (#1285 by @hoel-bagard)
RandomGamma now correctly works with float gamma_limit. (#1286 by @zahragolpa)

Speeded up Normalize in some case up to 2 times. (#563 by @Dipet)
GridDistortion, ElasticTransform and OpticalDistortion now supports bbox targets. (#476, #1262 by @ZFTurbo and @Dipet)
MotionBlur now supports allow_shifted flag. When it's value is False only non shifted kernels generated. (#1239 by @Dipet)
Updated versions of type formatters. (#1245 by @ternaus)
GridDistortion now supports normalized flag. When it is set to True will be applied distortion inside image border. (#722 by @poke1024)
Now you can describe downscale and upscale interpolation method for Downscale. This is needed to avoid interpolation artefacts. (#584 by @nathanhubens)
Refactoring. Spatial transforms moved to geometric files. (#1241 by @ternaus)
Refactoring. Common functions moved into albumentations.augmentations.utils.py. (#1260 by @Dipet)
Refactoring. Blur transforms moved into albumentations.augmentations.blur. (#1259 by @Dipet)