Added get_handlers method to ThumborServiceApp
Release 4.0.3
Fixing blank line in readme
Fixing raising error to just use max_radius for blur
Fixed format filter when using AUTO_WEBP=True
Release 4.0.4
Added support for filters in different phases of the image processing lifecycle
Added a pre load filter to extract focal points from the original image manual crop, if available
Version 4.1.0
No need to always convert cmyk. Fixes #295
Allow optional “merge” argument which defaults to 1

References thumbor/opencv-engine#4, thumbor/opencv-engine#5 and
thumbor/opencv-engine#6
Make small adjustments to thumbor.conf instructions