Borrowing from Jasspa MicroEmacs : Dired Sort Keybindings

I've been exploring Jasspa MicroEmacs lately - a lightweight Emacs like editor with a surprisingly thoughtful set of defaults, its footprint is surprisingly small, 1-2MB on your disk, useful for a portable Emacs or in my case allows me to run up an Emacs like editor on my work laptop (as it blocks GNU Emacs). No installation, just a single very small executable and it comes in many different…