Summarized Changelog:
- Tool updates: vwebp will now preserve the aspect ratio of images that exceed monitor resolution by scaling the image to fit
- resize fixes for Nx1 sizes and the addition of non-opaque alpha values for odd sizes
- lossless encode/decode performance improvements
- lossy compression performance improvement at low quality levels with flat content
- python swig files updated to support python 3
Signed-off-by: Pierre-Yves <pyu@riseup.net>