First new release in a couple years. Nothing big here. Sorry, I'm a cow; I move slow.

• Add "cupcake", "alpaca", and "fox" cows
• Fix "mech-and-cow" cow for file extension issue
• Fix "empbrace" typo in kiss.cow
• Better installation process, involving symlinks and stuff
• Migrate from AsciiDoc to Asciidoctor
• Make cowthink a symlink to cowsay
• Improve man page organization