This is the development code of Nvim-R. You may want to adjust Nvim's runtimepath in your ~/.nvimrc as in the example below:
set runtimepath=~/Nvim-R,~/.vim,$VIMRUNTIME,~/.vim/after
Stable versions will be released at http://www.lepem.ufc.br/jaa/Nvim-R.html
Please, read the file doc/Nvim-R.txt for usage details.
If you decide to use this version, you will also need the development version of nvimcom: https://github.com/jalvesaq/nvimcom