Install - Svtter/ACM.vim GitHub Wiki

You'd better Install with Vundle.

With Vundle

1. Install Vundle. Read this

2. add Plug-in

add Plugin 'Svtter/ACM.vim' to your .vimrc.

Without Vundle

you could copy the whole files to your $HOME/.vim/, but you may lose some new feature with this plug-in.