Remove trailing whitespace from all files.
Add some specs.
README.md: Github seems to require more spacing before sub-bullets.
Add format key to output.
Make sure width and height are parsed as integers.
Clean up scaled dimensions calculation.
Fix issue where -auto-orient is inserted too late into ImageMagick transformation chain. Fixes Tiramisu #4.
Fix issue with non-auto-orientation operating on rotated dimensions.
Add more tests.