Fix some Landscape.io errors and warnings
fix bicubic stretch interpolation
Add new fast ImagingTranspose function
unlock upscale filters
convert tabs to spaces
Add tests. Rise for "P" and "1".
Merge remote-tracking branch 'upstream/master' into landscape-fixes
Don't use builtin as variable
Merge pull request #970 from homm/fix-bicubic-stretch

Fix bicubic stretch interpolation
Update CHANGES.rst [ci skip]
Make test_imaging_stretch.py runnable as a standalone script
Fork from master and send pull requests to master

Master is essentially our dev branch.

[CI skip]
convert tabs into spaces
make transpose part of public api
less operations in loop
rotate 90 and 270 by chunks
make ROTATE_CHUNK constant
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Merge pull request #992 from hugovk/testimagingstretch

Make test_imaging_stretch.py runnable as a standalone script
Merge pull request #984 from hugovk/landscape-fixes

Fixed duplicate imports, naming variables after builtins
add test
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