Remove debug print made at 95f5d09717
added support for color negation
added test case for negate
Changelog for #174

Close #174
Fix modulate segfault #158
Changelog for #173

Fix #158
typo
Merge pull request #178 from yoloseem/patch-1

Fixed a typo on change log.
Fix incorrect param name in docs

Fix #180
Suggest to install freetype also if Homebrew

Fix #141
Accepts both image/gif and image/x-gif as valid GIF mimetypes when determine if an image is animated
Changelog for #181

Close #181
Update website url and copyright year
Merge branch '0.3-maintenance'