Handle rgba, hsl, and hsla colours, too, by mostly passing them to ImageMagick.
Remove the print that's causing us problems.
And add a test file.
Merge remote-tracking branch 'upstream/master'
Add some hex test cases, too.
Merge pull request #18 from bwinton/master

Handle rgba, hsl, and hsla colours, too, by mostly passing them to ImageMagick.