Basic amenities for vi readline bindings

.inputrc

set keymap vi-insert
Control-a: beginning-of-line
Control-b: backward-char
Control-d: delete-char
Control-e: end-of-line
Control-f: forward-char
Control-k: kill-line
Control-n: next-history
Control-p: previous-history
set keymap emacs-ctlx
v: vi-editing-mode
Control-v: "\C-xv\e"