lispy.el (lispy-build-semanticdb): modify Elisp db

* lispy.el (lispy-tag-arity-alist): Remove.
  (lispy-tag-regexp): Remove.
  (lispy-tag-arity): New variable.
  (lispy--tag-regexp): New function.
  (lispy-tag-arity-alist-cl): Remove.
  (lispy-tag-regexp-cl): Remove.
  (lispy--modify-tag): Generalize.
  (lispy--tag-name-elisp): Generalize.
  (lispy--tag-name-overlay): Remove
lispy.el (slime-edit-definition): declare
lispy.el (lispy--tag-name-lisp): change assoc to assq

* lispy.el (lispy--tag-name-elisp): Change assoc to assq.