Adds autoload cookie for minor mode definition.
Adds C-c C-x C-a to be passed via cxa.
Denotes the end of fingers.el.
Changes mode management.

* Use `define-globalized-minor-mode` rather than managing globally
  active minor mode manually

* Use single `fingers-mode-hook` that is run when fingers-mode is
  activated or deactivated

* Add minor mode to a 'fingers group

* Use `minibufferp' to identify minibuffer, rather than its major-mode

* Updates documentation.