Update copyright
Bump version
Make glue use ImageMagick to scale down retina sprites
Update --imagemagick and retina documentation
Remove soft 2px default for margin when using --ratios or --retina
Remove test__margin
Fix glue if you generate sprites only with pseudo classes #77
Add some test about pseudo class sprites #77
Fix camelcase separator not preserving original case #74
Update changelog
Add a note about running opting on Windows #70
Fix sprites containing images with filenames included in PSEUDO_CLASSES #59.