I have acid under .vim/init.vim yet my neovim client wont recognize commands like AcidEval, what am I doing wrong?

I'm having real trouble finding a tutorial on how to set up and install plugins in neovim. I've installed a few with vundle but apparently some need to be activated and I have no idea on how to do that. the :help plugin_name is not too helpful either

with a recent vim-sexp: v then <M-S-w> 😱

https://github.com/kkinnear/zprint/blob/master/doc/filter.md this is amazing. I just hooked this up.