First commit.
Update gemspec.
WIP: CLI, LOL.
Wire up CLI.
Add caching, progress bar, size transformation.
Redirect FFMPEG log to file.
Add argument descriptions. Remove CLI class methods.
Add download bar.
Add video cache.
Mock video collaborators.
Mock GifMaker collaborators.
Use WGif::DownloadBar.
Update version/gemspec.
Add Brewfile.
Update README. Add defaults to help.
Update README and version.
Update README. Remove unused fixture.