Unless explicitly specified otherwise, all files other than .vimrc itself
are to be installed in $HOME/.vim/. .vimrc itself is of course meant to go
directly into $HOME.
I now use vim-plug. :PlugInstall should be adequate to take care of
everything.
One important thing I've noticed is that, if this configuration is to be used
on Google Cloud Shell, the following needs to be added to $HOME/.bashrc (or
equivalent) to work:
export TERM=xterm-256colorYou may as well set the background color in Google Cloud Shell to #000 then
to avoid the ugly clash that would happen otherwise.