mercurial: update 3.1.1 bottle.
mecab-ko-dic 1.6.1-20140814

Updated mecab-ko-dic to 1.6.1-20140814. Also removed the caveats editing
config manually and added a shell command to do it automatically
instead.

Closes #32009.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Use "if empty?" instead of "unless any?"
Make update work from forks of Homebrew

This makes update also handle any upstream repo setup.