.osx: Use plain text smileys in Messages
.osx: Use plain text smileys in Messages

Messages in OS X 10.9 Mavericks automatically substitutes e.g. `:)` with `😊`, with no way to disable this feature through the app’s preferences pane.

After analyzing the `defaults read` output it turns out there is a hidden preference for it.

natchiketa/dotfiles,natchiketa/dotfiles,natchiketa/dotfiles