lispy.el (lispy--insert-or-call): change signature

* lispy.el (lispy--insert-or-call): Change signature.
  (lispy-define-key): Change signature.

Now instead of

    (lispy-define-key map "w" 'lispy-move-up t)

use

    (lispy-define-key map "w" 'lispy-move-up :a)

This allows to have more than one boolean flag, e.g.:

    (lispy-define-key map "w" 'lispy-move-up :a :b :c)