Don't automatically add next/prev occurrance on addMatch()
[1.1.1] Add :Multiedit! for start-of-word INSERT

- Add :Multiedit! - will move insert caret to the start of the
  word, instead of the end. Kep map for this is <leader>I
- Fix automatically adding next/prev occurrence when using
  :MultieditNextMatch and :MultieditPreviousMatch