Typing a non-control character during preedit turns Mozc off.

This should provide better compatibility with boiled/boiling-egg.

You can revert to the old way (i.e., the typed character is appended to
the preedit) by setting variable `boiled-mozc-extensible-preedit'
non-nil.
Add a plus sign to the version number ('0.7+').

Just to indicate this isn't the original boiled-mozc.