Clarified statement development stopping
Clarified statement development stopping

This comment is based on [Shougo's comment on reddit](https://www.reddit.com/r/vim/comments/47qbv9/neobundle_on_hiatus_or_done/d0fcdel):

> NeoBundle development is done. I have replaced to dein.vim. Dein.vim is faster and well tested. And it implements neovim asynchronous installer.
Shougo/neobundle.vim