Pass initialization preferences to Rope.

This allows some modules like sys to be completed.

See #230 (and the link there) for a discussion.
Minor bugfix when finding Jedi completions.
Compatibility alias for defvar-local.

Recent versions of nose.el use this, breaking Emacs compatibility
with earlier Emacs 24.x versions.

Backport of 6bd83f58.
Bump version: 1.4.0 → 1.4.1