Animated WebP Support, ICC Color Profiles, and more

This is the first release in a while, with far more changes than is worth listing here!

Some highlights include:

• Animated WebP Support: accepted as input and output, including conversion between animated image formats (e.g. GIF->WebP)
• Preservation of ICC color profile data from images & video
• Detection of whether an input video has subtitles or is optimized for web streaming.
• HEVC video input support
• Thumbhash encoder
• Many updated dependencies
• Many bug fixes

Please continue to submit pull-requests and issues. We'll do our best to stay current and merge when possible.

Audio

lilliput now supports Audio. Also, enable -fPIC in builds for greater compatibility.

Fixes for outstanding bugs

This change forces lilliput's output to never exceed 8 bits per channel, which isn't supported by many image containers. Also, it includes some tweaks to the libavcodec wrapper to support more videos.

Lilliput 1.0

Lilliput is cool and you should use it.