imgp v2.4 – Blazing fast image resizer and rotator. Go crunch 'em

What's in?

- New option `--quality` (`-q`) to specify quality [default: 75]

- Homebrew tap for OS X users [`brew install jarun/imgp/imgp`]

- Option `--quiet` is now `--mute`

- Use global fill color white (#ffffff) for alpha channel