Change how peco.Finish handles the line under cursor
Change how peco.Finish handles the line under cursor

Only add the line where the cursor is only if there are no other
selected lines before hand. This apparently matches what percol does,
and I agree that it's more intuitive

refs: http://twitter.com/mattn_jp/status/485951916040413184

reiki4040/peco,dav009/peco,ken-saka/peco,peco/peco,polamjag/peco,ukitazume/peco